diff --git a/pkg/jmap/jmap_api_mailbox.go b/pkg/jmap/jmap_api_mailbox.go
index 633499e19f..6c43e20b65 100644
--- a/pkg/jmap/jmap_api_mailbox.go
+++ b/pkg/jmap/jmap_api_mailbox.go
@@ -2,6 +2,7 @@ package jmap
 
 import (
 	"context"
+	"slices"
 
 	"github.com/opencloud-eu/opencloud/pkg/log"
 	"github.com/opencloud-eu/opencloud/pkg/structs"
@@ -15,41 +16,27 @@ type MailboxesResponse struct {
 }
 
 // https://jmap.io/spec-mail.html#mailboxget
-func (j *Client) GetMailbox(accountIds []string, session *Session, ctx context.Context, logger *log.Logger, ids []string) (map[string]MailboxesResponse, SessionState, Error) {
+func (j *Client) GetMailbox(accountId string, session *Session, ctx context.Context, logger *log.Logger, ids []string) (MailboxesResponse, SessionState, Error) {
 	logger = j.logger("GetMailbox", session, logger)
 
-	uniqueAccountIds := structs.Uniq(accountIds)
-	n := len(uniqueAccountIds)
-	if n < 1 {
-		return map[string]MailboxesResponse{}, "", nil
-	}
-
-	invocations := make([]Invocation, n)
-	for i, accountId := range uniqueAccountIds {
-		invocations[i] = invocation(CommandMailboxGet, MailboxGetCommand{AccountId: accountId, Ids: ids}, mcid(accountId, "0"))
-	}
-
-	cmd, err := j.request(session, logger, invocations...)
+	cmd, err := j.request(session, logger,
+		invocation(CommandMailboxGet, MailboxGetCommand{AccountId: accountId, Ids: ids}, "0"),
+	)
 	if err != nil {
-		return map[string]MailboxesResponse{}, "", err
+		return MailboxesResponse{}, "", err
 	}
 
-	return command(j.api, logger, ctx, session, j.onSessionOutdated, cmd, func(body *Response) (map[string]MailboxesResponse, Error) {
-		resp := map[string]MailboxesResponse{}
-		for _, accountId := range uniqueAccountIds {
-			var response MailboxGetResponse
-			err = retrieveResponseMatchParameters(logger, body, CommandMailboxGet, mcid(accountId, "0"), &response)
-			if err != nil {
-				return map[string]MailboxesResponse{}, err
-			}
-
-			resp[accountId] = MailboxesResponse{
-				Mailboxes: response.List,
-				NotFound:  response.NotFound,
-				State:     response.State,
-			}
+	return command(j.api, logger, ctx, session, j.onSessionOutdated, cmd, func(body *Response) (MailboxesResponse, Error) {
+		var response MailboxGetResponse
+		err = retrieveResponseMatchParameters(logger, body, CommandMailboxGet, "0", &response)
+		if err != nil {
+			return MailboxesResponse{}, err
 		}
-		return resp, nil
+		return MailboxesResponse{
+			Mailboxes: response.List,
+			NotFound:  response.NotFound,
+			State:     response.State,
+		}, nil
 	})
 }
 
@@ -59,20 +46,40 @@ type AllMailboxesResponse struct {
 }
 
 func (j *Client) GetAllMailboxes(accountIds []string, session *Session, ctx context.Context, logger *log.Logger) (map[string]AllMailboxesResponse, SessionState, Error) {
-	resp, sessionState, err := j.GetMailbox(accountIds, session, ctx, logger, nil)
+	logger = j.logger("GetAllMailboxes", session, logger)
+
+	uniqueAccountIds := structs.Uniq(accountIds)
+	n := len(uniqueAccountIds)
+	if n < 1 {
+		return map[string]AllMailboxesResponse{}, "", nil
+	}
+
+	invocations := make([]Invocation, n)
+	for i, accountId := range uniqueAccountIds {
+		invocations[i] = invocation(CommandMailboxGet, MailboxGetCommand{AccountId: accountId}, mcid(accountId, "0"))
+	}
+
+	cmd, err := j.request(session, logger, invocations...)
 	if err != nil {
-		return map[string]AllMailboxesResponse{}, sessionState, err
+		return map[string]AllMailboxesResponse{}, "", err
 	}
 
-	mapped := make(map[string]AllMailboxesResponse, len(resp))
-	for accountId, mailboxesResponse := range resp {
-		mapped[accountId] = AllMailboxesResponse{
-			Mailboxes: mailboxesResponse.Mailboxes,
-			State:     mailboxesResponse.State,
+	return command(j.api, logger, ctx, session, j.onSessionOutdated, cmd, func(body *Response) (map[string]AllMailboxesResponse, Error) {
+		resp := map[string]AllMailboxesResponse{}
+		for _, accountId := range uniqueAccountIds {
+			var response MailboxGetResponse
+			err = retrieveResponseMatchParameters(logger, body, CommandMailboxGet, mcid(accountId, "0"), &response)
+			if err != nil {
+				return map[string]AllMailboxesResponse{}, err
+			}
+
+			resp[accountId] = AllMailboxesResponse{
+				Mailboxes: response.List,
+				State:     response.State,
+			}
 		}
-	}
-
-	return mapped, sessionState, nil
+		return resp, nil
+	})
 }
 
 type Mailboxes struct {
@@ -92,7 +99,11 @@ func (j *Client) SearchMailboxes(accountIds []string, session *Session, ctx cont
 		invocations[i*2+0] = invocation(CommandMailboxQuery, MailboxQueryCommand{AccountId: accountId, Filter: filter}, mcid(accountId, "0"))
 		invocations[i*2+1] = invocation(CommandMailboxGet, MailboxGetRefCommand{
 			AccountId: accountId,
-			IdRef:     &ResultReference{Name: CommandMailboxQuery, Path: "/ids/*", ResultOf: mcid(accountId, "0")},
+			IdsRef: &ResultReference{
+				Name:     CommandMailboxQuery,
+				Path:     "/ids/*",
+				ResultOf: mcid(accountId, "0"),
+			},
 		}, mcid(accountId, "1"))
 	}
 	cmd, err := j.request(session, logger, invocations...)
@@ -288,3 +299,56 @@ func (j *Client) GetMailboxChangesForMultipleAccounts(accountIds []string, sessi
 		return resp, nil
 	})
 }
+
+func (j *Client) GetMailboxRolesForMultipleAccounts(accountIds []string, session *Session, ctx context.Context, logger *log.Logger) (map[string][]string, SessionState, Error) {
+	logger = j.logger("GetMailboxRolesForMultipleAccounts", session, logger)
+
+	uniqueAccountIds := structs.Uniq(accountIds)
+	n := len(uniqueAccountIds)
+	if n < 1 {
+		return map[string][]string{}, "", nil
+	}
+
+	t := true
+
+	invocations := make([]Invocation, n*2)
+	for i, accountId := range uniqueAccountIds {
+		invocations[i*2+0] = invocation(CommandMailboxQuery, MailboxQueryCommand{
+			AccountId: accountId,
+			Filter: MailboxFilterCondition{
+				HasAnyRole: &t,
+			},
+		}, mcid(accountId, "0"))
+		invocations[i*2+1] = invocation(CommandMailboxGet, MailboxGetRefCommand{
+			AccountId: accountId,
+			IdsRef: &ResultReference{
+				ResultOf: mcid(accountId, "0"),
+				Name:     CommandMailboxQuery,
+				Path:     "/ids",
+			},
+		}, mcid(accountId, "1"))
+	}
+
+	cmd, err := j.request(session, logger, invocations...)
+	if err != nil {
+		return map[string][]string{}, "", err
+	}
+
+	return command(j.api, logger, ctx, session, j.onSessionOutdated, cmd, func(body *Response) (map[string][]string, Error) {
+		resp := make(map[string][]string, n)
+		for _, accountId := range uniqueAccountIds {
+			var getResponse MailboxGetResponse
+			err = retrieveResponseMatchParameters(logger, body, CommandMailboxGet, mcid(accountId, "1"), &getResponse)
+			if err != nil {
+				return map[string][]string{}, err
+			}
+			roles := make([]string, len(getResponse.List))
+			for i, mailbox := range getResponse.List {
+				roles[i] = mailbox.Role
+			}
+			slices.Sort(roles)
+			resp[accountId] = roles
+		}
+		return resp, nil
+	})
+}
diff --git a/pkg/jmap/jmap_error.go b/pkg/jmap/jmap_error.go
index bbb49b520d..710ff397bb 100644
--- a/pkg/jmap/jmap_error.go
+++ b/pkg/jmap/jmap_error.go
@@ -18,9 +18,18 @@ const (
 	JmapErrorInvalidSessionResponse
 	JmapErrorInvalidJmapRequestPayload
 	JmapErrorInvalidJmapResponsePayload
-	JmapErrorMethodLevel
 	JmapErrorSetError
 	JmapErrorTooManyMethodCalls
+	JmapErrorUnspecifiedType
+	JmapErrorServerUnavailable
+	JmapErrorServerFail
+	JmapErrorUnknownMethod
+	JmapErrorInvalidArguments
+	JmapErrorInvalidResultReference
+	JmapErrorForbidden
+	JmapErrorAccountNotFound
+	JmapErrorAccountNotSupportedByMethod
+	JmapErrorAccountReadOnly
 )
 
 var (
diff --git a/pkg/jmap/jmap_model.go b/pkg/jmap/jmap_model.go
index 9ce4552005..48dbd50746 100644
--- a/pkg/jmap/jmap_model.go
+++ b/pkg/jmap/jmap_model.go
@@ -27,6 +27,28 @@ const (
 	JmapKeywordJunk      = "$junk"
 	JmapKeywordNotJunk   = "$notjunk"
 	JmapKeywordMdnSent   = "$mdnsent"
+
+	// https://www.iana.org/assignments/imap-mailbox-name-attributes/imap-mailbox-name-attributes.xhtml
+	//JmapMailboxRoleAll        = "all"
+	//JmapMailboxRoleArchive    = "archive"
+	JmapMailboxRoleDrafts = "drafts"
+	//JmapMailboxRoleFlagged    = "flagged"
+	//JmapMailboxRoleImportant  = "important"
+	JmapMailboxRoleInbox = "inbox"
+	JmapMailboxRoleJunk  = "junk"
+	JmapMailboxRoleSent  = "sent"
+	//JmapMailboxRoleSubscribed = "subscribed"
+	JmapMailboxRoleTrash = "trash"
+)
+
+var (
+	JmapMailboxRoles = []string{
+		JmapMailboxRoleInbox,
+		JmapMailboxRoleSent,
+		JmapMailboxRoleDrafts,
+		JmapMailboxRoleJunk,
+		JmapMailboxRoleTrash,
+	}
 )
 
 type SessionMailAccountCapabilities struct {
@@ -352,6 +374,52 @@ type SessionResponse struct {
 	State SessionState `json:"state,omitempty"`
 }
 
+// Method level error types.
+const (
+	// Some internal server resource was temporarily unavailable.
+	//
+	// Attempting the same operation later (perhaps after a backoff with a random factor) may succeed.
+	MethodLevelErrorServerUnavailable = "serverUnavailable"
+
+	// An unexpected or unknown error occurred during the processing of the call.
+	//
+	// A description property should provide more details about the error. The method call made no changes
+	// to the server’s state. Attempting the same operation again is expected to fail again.
+	// Contacting the service administrator is likely necessary to resolve this problem if it is persistent.
+	MethodLevelErrorServerFail = "serverFail"
+
+	// Some, but not all, expected changes described by the method occurred.
+	//
+	// The client MUST resynchronise impacted data to determine server state. Use of this error is strongly discouraged.
+	MethodLevelErrorServerPartialFail = "serverPartialFail"
+
+	// The server does not recognise this method name.
+	MethodLevelErrorUnknownMethod = "unknownMethod"
+
+	// One of the arguments is of the wrong type or is otherwise invalid, or a required argument is missing.
+	//
+	// A description property MAY be present to help debug with an explanation of what the problem was.
+	// This is a non-localised string, and it is not intended to be shown directly to end users.
+	MethodLevelErrorInvalidArguments = "invalidArguments"
+
+	// The method used a result reference for one of its arguments, but this failed to resolve.
+	MethodLevelErrorInvalidResultReference = "invalidResultReference"
+
+	// The method and arguments are valid, but executing the method would violate an Access Control List
+	// (ACL) or other permissions policy.
+	MethodLevelErrorForbidden = "forbidden"
+
+	// The accountId does not correspond to a valid account.
+	MethodLevelErrorAccountNotFound = "accountNotFound"
+
+	// The accountId given corresponds to a valid account, but the account does not support this method or data type.
+	MethodLevelErrorAccountNotSupportedByMethod = "accountNotSupportedByMethod"
+
+	// This method modifies state, but the account is read-only (as returned on the corresponding Account object in
+	// the JMAP Session resource).
+	MethodLevelErrorAccountReadOnly = "accountReadOnly"
+)
+
 // SetError type values.
 const (
 	// The create/update/destroy would violate an ACL or other permissions policy.
@@ -648,7 +716,7 @@ type MailboxGetCommand struct {
 
 type MailboxGetRefCommand struct {
 	AccountId string           `json:"accountId"`
-	IdRef     *ResultReference `json:"#ids,omitempty"`
+	IdsRef    *ResultReference `json:"#ids,omitempty"`
 }
 
 type MailboxChangesCommand struct {
@@ -2654,7 +2722,13 @@ type SearchSnippetGetResponse struct {
 	NotFound  []string        `json:"notFound,omitempty"`
 }
 
+type ErrorResponse struct {
+	Type        string `json:"type"`
+	Description string `json:"description,omitempty"`
+}
+
 const (
+	ErrorCommand               Command = "error" // only occurs in responses
 	CommandBlobGet             Command = "Blob/get"
 	CommandBlobUpload          Command = "Blob/upload"
 	CommandEmailGet            Command = "Email/get"
@@ -2675,6 +2749,7 @@ const (
 )
 
 var CommandResponseTypeMap = map[Command]func() any{
+	ErrorCommand:               func() any { return ErrorResponse{} },
 	CommandBlobGet:             func() any { return BlobGetResponse{} },
 	CommandBlobUpload:          func() any { return BlobUploadResponse{} },
 	CommandMailboxQuery:        func() any { return MailboxQueryResponse{} },
diff --git a/pkg/jmap/jmap_tools.go b/pkg/jmap/jmap_tools.go
index 81feedfaa8..4db5c4709c 100644
--- a/pkg/jmap/jmap_tools.go
+++ b/pkg/jmap/jmap_tools.go
@@ -3,9 +3,11 @@ package jmap
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"maps"
 	"reflect"
+	"strings"
 	"sync"
 	"time"
 
@@ -66,7 +68,7 @@ func command[T any](api ApiClient,
 	var response Response
 	err := json.Unmarshal(responseBody, &response)
 	if err != nil {
-		logger.Error().Err(err).Msg("failed to deserialize body JSON payload")
+		logger.Error().Err(err).Msgf("failed to deserialize body JSON payload into a %T", response)
 		var zero T
 		return zero, "", SimpleError{code: JmapErrorDecodingResponseBody, err: err}
 	}
@@ -80,15 +82,50 @@ func command[T any](api ApiClient,
 	// search for an "error" response
 	// https://jmap.io/spec-core.html#method-level-errors
 	for _, mr := range response.MethodResponses {
-		if mr.Command == "error" {
-			err := fmt.Errorf("found method level error in response '%v'", mr.Tag)
-			if payload, ok := mr.Parameters.(map[string]any); ok {
-				if errorType, ok := payload["type"]; ok {
-					err = fmt.Errorf("found method level error in response '%v', type: '%v'", mr.Tag, errorType)
+		if mr.Command == ErrorCommand {
+			if errorParameters, ok := mr.Parameters.(ErrorResponse); ok {
+				code := JmapErrorServerFail
+				switch errorParameters.Type {
+				case MethodLevelErrorServerUnavailable:
+					code = JmapErrorServerUnavailable
+				case MethodLevelErrorServerFail, MethodLevelErrorServerPartialFail:
+					code = JmapErrorServerFail
+				case MethodLevelErrorUnknownMethod:
+					code = JmapErrorUnknownMethod
+				case MethodLevelErrorInvalidArguments:
+					code = JmapErrorInvalidArguments
+				case MethodLevelErrorInvalidResultReference:
+					code = JmapErrorInvalidResultReference
+				case MethodLevelErrorForbidden:
+					// there's a quirk here: when referencing an account that exists but that this
+					// user has no access to, Stalwart returns the 'forbidden' error, but this might
+					// leak the existence of an account to an attacker -- instead, we deem it safer to
+					// return a "account does not exist" error instead
+					if strings.HasPrefix(errorParameters.Description, "You do not have access to account") {
+						code = JmapErrorAccountNotFound
+					} else {
+						code = JmapErrorForbidden
+					}
+				case MethodLevelErrorAccountNotFound:
+					code = JmapErrorAccountNotFound
+				case MethodLevelErrorAccountNotSupportedByMethod:
+					code = JmapErrorAccountNotSupportedByMethod
+				case MethodLevelErrorAccountReadOnly:
+					code = JmapErrorAccountReadOnly
 				}
+				msg := fmt.Sprintf("found method level error in response '%v', type: '%v', description: '%v'", mr.Tag, errorParameters.Type, errorParameters.Description)
+				err = errors.New(msg)
+				logger.Warn().Int("code", code).Str("type", errorParameters.Type).Msg(msg)
+				var zero T
+				return zero, response.SessionState, SimpleError{code: code, err: err}
+			} else {
+				code := JmapErrorUnspecifiedType
+				msg := fmt.Sprintf("found method level error in response '%v'", mr.Tag)
+				err := errors.New(msg)
+				logger.Warn().Int("code", code).Msg(msg)
+				var zero T
+				return zero, response.SessionState, SimpleError{code: code, err: err}
 			}
-			var zero T
-			return zero, response.SessionState, SimpleError{code: JmapErrorMethodLevel, err: err}
 		}
 	}
 
diff --git a/pkg/jmap/jmap_tools_test.go b/pkg/jmap/jmap_tools_test.go
index d6c385b770..2c0beea6d8 100644
--- a/pkg/jmap/jmap_tools_test.go
+++ b/pkg/jmap/jmap_tools_test.go
@@ -134,3 +134,19 @@ func TestMarshallingUnknown(t *testing.T) {
 	require.NoError(err)
 	require.Equal(`{"subject":"aaa","bodyStructure":{"header:a":"bc","header:x":"yz","partId":"b","type":"a"}}`, string(result))
 }
+
+func TestUnmarshallingError(t *testing.T) {
+	require := require.New(t)
+
+	responseBody := `{"methodResponses":[["error",{"type":"forbidden","description":"You do not have access to account a"},"a:0"]],"sessionState":"3e25b2a0"}`
+	var response Response
+	err := json.Unmarshal([]byte(responseBody), &response)
+	require.NoError(err)
+	require.Len(response.MethodResponses, 1)
+	require.Equal(ErrorCommand, response.MethodResponses[0].Command)
+	require.Equal("a:0", response.MethodResponses[0].Tag)
+	require.IsType(ErrorResponse{}, response.MethodResponses[0].Parameters)
+	er, _ := response.MethodResponses[0].Parameters.(ErrorResponse)
+	require.Equal("forbidden", er.Type)
+	require.Equal("You do not have access to account a", er.Description)
+}
diff --git a/services/groupware/pkg/groupware/groupware_api_mailbox.go b/services/groupware/pkg/groupware/groupware_api_mailbox.go
index 75ad42634d..2472e6a21a 100644
--- a/services/groupware/pkg/groupware/groupware_api_mailbox.go
+++ b/services/groupware/pkg/groupware/groupware_api_mailbox.go
@@ -41,13 +41,12 @@ func (g *Groupware) GetMailbox(w http.ResponseWriter, r *http.Request) {
 			return errorResponse(err)
 		}
 
-		mailboxesByAccountId, sessionState, jerr := g.jmap.GetMailbox([]string{accountId}, req.session, req.ctx, req.logger, []string{mailboxId})
+		mailboxes, sessionState, jerr := g.jmap.GetMailbox(accountId, req.session, req.ctx, req.logger, []string{mailboxId})
 		if jerr != nil {
 			return req.errorResponseFromJmap(jerr)
 		}
 
-		mailboxes, ok := mailboxesByAccountId[accountId]
-		if ok && len(mailboxes.Mailboxes) == 1 {
+		if len(mailboxes.Mailboxes) == 1 {
 			return etagResponse(mailboxes.Mailboxes[0], sessionState, mailboxes.State)
 		} else {
 			return notFoundResponse(sessionState)
@@ -209,6 +208,27 @@ func (g *Groupware) GetMailboxesForAllAccounts(w http.ResponseWriter, r *http.Re
 	})
 }
 
+func (g *Groupware) GetMailboxByRoleForAllAccounts(w http.ResponseWriter, r *http.Request) {
+	role := chi.URLParam(r, UriParamRole)
+	g.respond(w, r, func(req Request) Response {
+		accountIds := structs.Keys(req.session.Accounts)
+		if len(accountIds) < 1 {
+			return noContentResponse("")
+		}
+		logger := log.From(req.logger.With().Array(logAccountId, log.SafeStringArray(accountIds)).Str("role", role))
+
+		filter := jmap.MailboxFilterCondition{
+			Role: role,
+		}
+
+		mailboxesByAccountId, sessionState, err := g.jmap.SearchMailboxes(accountIds, req.session, req.ctx, logger, filter)
+		if err != nil {
+			return req.errorResponseFromJmap(err)
+		}
+		return response(mailboxesByAccountId, sessionState)
+	})
+}
+
 // When the request succeeds.
 // swagger:response MailboxChangesResponse200
 type SwaggerMailboxChangesResponse200 struct {
@@ -308,3 +328,19 @@ func (g *Groupware) GetMailboxChangesForAllAccounts(w http.ResponseWriter, r *ht
 		return response(changesByAccountId, sessionState)
 	})
 }
+
+func (g *Groupware) GetMailboxRoles(w http.ResponseWriter, r *http.Request) {
+	g.respond(w, r, func(req Request) Response {
+		l := req.logger.With()
+		allAccountIds := structs.Keys(req.session.Accounts) // TODO(pbleser-oc) do we need a limit for a maximum amount of accounts to query at once?
+		l.Array(logAccountId, log.SafeStringArray(allAccountIds))
+		logger := log.From(l)
+
+		rolesByAccountId, sessionState, jerr := g.jmap.GetMailboxRolesForMultipleAccounts(allAccountIds, req.session, req.ctx, logger)
+		if jerr != nil {
+			return req.errorResponseFromJmap(jerr)
+		}
+
+		return response(rolesByAccountId, sessionState)
+	})
+}
diff --git a/services/groupware/pkg/groupware/groupware_error.go b/services/groupware/pkg/groupware/groupware_error.go
index ae95a0a3f4..0039cb7fd7 100644
--- a/services/groupware/pkg/groupware/groupware_error.go
+++ b/services/groupware/pkg/groupware/groupware_error.go
@@ -138,6 +138,20 @@ func groupwareErrorFromJmap(j jmap.Error) *GroupwareError {
 		return &ErrorInvalidRequestPayload
 	case jmap.JmapErrorInvalidJmapResponsePayload:
 		return &ErrorInvalidResponsePayload
+	case jmap.JmapErrorUnspecifiedType, jmap.JmapErrorUnknownMethod, jmap.JmapErrorInvalidArguments, jmap.JmapErrorInvalidResultReference:
+		return &ErrorInvalidGroupwareRequest
+	case jmap.JmapErrorServerUnavailable:
+		return &ErrorServerUnavailable
+	case jmap.JmapErrorServerFail:
+		return &ErrorServerFailure
+	case jmap.JmapErrorForbidden:
+		return &ErrorForbiddenOperation
+	case jmap.JmapErrorAccountNotFound:
+		return &ErrorAccountNotFound
+	case jmap.JmapErrorAccountNotSupportedByMethod:
+		return &ErrorAccountNotSupportedByMethod
+	case jmap.JmapErrorAccountReadOnly:
+		return &ErrorAccountReadOnly
 	default:
 		return &ErrorGeneric
 	}
@@ -167,6 +181,13 @@ const (
 	ErrorCodeInvalidUserRequest                = "INVURQ"
 	ErrorCodeUsernameEmailDomainNotGreenListed = "UEDGRE"
 	ErrorCodeUsernameEmailDomainRedListed      = "UEDRED"
+	ErrorCodeInvalidGroupwareRequest           = "GPRERR"
+	ErrorCodeServerUnavailable                 = "SRVUNA"
+	ErrorCodeServerFailure                     = "SRVFLR"
+	ErrorCodeForbiddenOperation                = "FRBOPR"
+	ErrorCodeAccountNotFound                   = "ACCNFD"
+	ErrorCodeAccountNotSupportedByMethod       = "ACCNSM"
+	ErrorCodeAccountReadOnly                   = "ACCRDO"
 )
 
 var (
@@ -308,6 +329,48 @@ var (
 		Title:  "Domain is redlisted",
 		Detail: "The username email address domain is redlisted.",
 	}
+	ErrorInvalidGroupwareRequest = GroupwareError{
+		Status: http.StatusInternalServerError,
+		Code:   ErrorCodeInvalidGroupwareRequest,
+		Title:  "Internal Request Error",
+		Detail: "The request constructed by the Groupware is regarded as invalid by the Mail server.",
+	}
+	ErrorServerUnavailable = GroupwareError{
+		Status: http.StatusServiceUnavailable,
+		Code:   ErrorCodeServerUnavailable,
+		Title:  "Mail Server is unavailable",
+		Detail: "The Mail Server is currently unable to process the request.",
+	}
+	ErrorServerFailure = GroupwareError{
+		Status: http.StatusInternalServerError,
+		Code:   ErrorCodeServerFailure,
+		Title:  "Mail Server is unable to process the Request",
+		Detail: "The Mail Server is unable to process the request.",
+	}
+	ErrorForbiddenOperation = GroupwareError{
+		Status: http.StatusForbidden,
+		Code:   ErrorCodeForbiddenOperation,
+		Title:  "The Operation is forbidden by the Mail Server",
+		Detail: "The Mail Server refuses to perform the request.",
+	}
+	ErrorAccountNotFound = GroupwareError{
+		Status: http.StatusNotFound,
+		Code:   ErrorCodeAccountNotFound,
+		Title:  "The referenced Account does not exist",
+		Detail: "The Account that was referenced in the request does not exist.",
+	}
+	ErrorAccountNotSupportedByMethod = GroupwareError{
+		Status: http.StatusForbidden,
+		Code:   ErrorCodeAccountNotSupportedByMethod,
+		Title:  "The referenced Account does not supported the requested method",
+		Detail: "The Account that was referenced in the request does not supported the requested method or data type.",
+	}
+	ErrorAccountReadOnly = GroupwareError{
+		Status: http.StatusForbidden,
+		Code:   ErrorCodeAccountReadOnly,
+		Title:  "The referenced Account is read-only",
+		Detail: "The Account that was referenced in the request only supports read-only operations.",
+	}
 )
 
 type ErrorOpt interface {
diff --git a/services/groupware/pkg/groupware/groupware_route.go b/services/groupware/pkg/groupware/groupware_route.go
index 664fb61e99..b87126b38a 100644
--- a/services/groupware/pkg/groupware/groupware_route.go
+++ b/services/groupware/pkg/groupware/groupware_route.go
@@ -15,6 +15,7 @@ const (
 	UriParamBlobId                    = "blobid"
 	UriParamBlobName                  = "blobname"
 	UriParamStreamId                  = "stream"
+	UriParamRole                      = "role"
 	QueryParamMailboxSearchName       = "name"
 	QueryParamMailboxSearchRole       = "role"
 	QueryParamMailboxSearchSubscribed = "subscribed"
@@ -48,8 +49,10 @@ func (g *Groupware) Route(r chi.Router) {
 	r.Get("/accounts", g.GetAccounts)
 	r.Route("/accounts/all", func(r chi.Router) {
 		r.Route("/mailboxes", func(r chi.Router) {
-			r.Get("/", g.GetMailboxesForAllAccounts)
+			r.Get("/", g.GetMailboxesForAllAccounts) // ?role=
 			r.Get("/changes", g.GetMailboxChangesForAllAccounts)
+			r.Get("/roles", g.GetMailboxRoles)                       // ?role=
+			r.Get("/roles/{role}", g.GetMailboxByRoleForAllAccounts) // ?role=
 		})
 	})
 	r.Route("/accounts/{accountid}", func(r chi.Router) {