MailClient.Imap.Base.BasicResponse response) [0x00047]

I’m stumped. Setting up my dovecot IMAP account worked fine on a Windows PC and the first Mac, but the second Mac it keeps throwing an error. Account set up is with the same settings as in the other two clients, and username/pass are correct since both SMTP sending and getting the list of folders work fine, but no email is synchronised. Server logs only show ENABLE, LIST and NOOP commands before the client disconnects again.

Stack trace:
09:28:52 Droso [IMAP] Synchronizing subfolders: Done
09:28:52 Droso [IMAP] Synchronizing messages: For folder Droso/INBOX
09:28:52 Droso [IMAP] Synchronizing messages: For folder Droso/INBOX
09:28:52 MailClient.Accounts.ConnectionException:
09:28:52 ()
09:28:52 at MailClient.Protocols.Imap.Synchronizer+ImapCommand.ThrowIfConnectionBroken (MailClient.Imap.Base.BasicResponse response) [0x00047] in <122548b6b60d430bb3e0ce151017ecac>:0
09:28:52 at MailClient.Protocols.Imap.Synchronizer+ImapCommand.MailClient.Protocols.Imap.Synchronizer.IImapCommand.ThrowIfConnectionBroken (MailClient.Imap.Base.BasicResponse response) [0x00000] in <122548b6b60d430bb3e0ce151017ecac>:0
09:28:52 at MailClient.Protocols.Imap.ConnectionPoolEntry.SelectFolder (MailClient.Storage.Application.Folder value, System.Boolean force) [0x0017c] in <122548b6b60d430bb3e0ce151017ecac>:0
09:28:52 at MailClient.Protocols.Imap.ConnectionPoolEntry.SelectFolder (MailClient.Storage.Application.Folder value) [0x00000] in <122548b6b60d430bb3e0ce151017ecac>:0
09:28:52 at MailClient.Protocols.Imap.ConnectionPool.AcquireConnection (MailClient.Storage.Application.Folder mailFolder, System.Boolean idle, System.Boolean forStore) [0x00222] in <122548b6b60d430bb3e0ce151017ecac>:0
09:28:52 at MailClient.Protocols.Imap.ConnectionPool.AcquireFolderConnection (MailClient.Storage.Application.Folder mailFolder) [0x00000] in <122548b6b60d430bb3e0ce151017ecac>:0
09:28:52 at MailClient.Protocols.Imap.ConnectionContext…ctor (MailClient.Protocols.Imap.ImapAccount account, MailClient.Storage.Application.Folder folder, System.Boolean forStore) [0x00036] in <122548b6b60d430bb3e0ce151017ecac>:0
09:28:52 at MailClient.Protocols.Imap.ConnectionContext…ctor (MailClient.Protocols.Imap.ImapAccount account, MailClient.Storage.Application.Folder folder) [0x00000] in <122548b6b60d430bb3e0ce151017ecac>:0
09:28:52 at MailClient.Protocols.Imap.Synchronizer+FolderInfo.CreateConnectionContext () [0x00000] in <122548b6b60d430bb3e0ce151017ecac>:0
09:28:52 at MailClient.Protocols.Imap.Synchronizer+SynchronizeMessagesCommand.ExecuteInternal (MailClient.Commands.WorkerStatus status) [0x00092] in <122548b6b60d430bb3e0ce151017ecac>:0
09:28:52 at MailClient.Protocols.Imap.Synchronizer+ImapCommand.Execute (MailClient.Commands.WorkerStatus status) [0x00012] in <122548b6b60d430bb3e0ce151017ecac>:0
09:28:52 at MailClient.Commands.Command.Process (MailClient.Commands.WorkerStatus status) [0x00012] in :0

Are you using the same version of eM Client on both Macs? If not, can you update them both to the latest version available in the Release History.

Thanks Gary. Yes, both were freshly installed this week, version 7.2.37965.0. But, the best advice as always, take a break from the computer :slight_smile:
Cycling back from the office, I remember a key difference between the two Macs: the antivirus configuration. Turning off Avast Email Shield makes it work just fine. This yet again confirms my prejudice against the quality of antivirus product, and especially their MITM methods that make things really hard to debug.

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So happy you found the cause.