#3063 ✓cantreproduce

Issue with sent mailbox

Reported by Matthew | April 24th, 2022 @ 01:22 PM

Hi there,

I'm a new user, so bear with me.

When sending from my MS365 account, I'm getting the following error message:

Failed to upload message
Server response: "14 NO Server Unavailable. 15". Command attempted: "14 APPEND "Sent Items" (\Seen) "24Apr-2022 13:54:45 +0100" {18392}".
Tip: Open the Activity Viewer (T30) before retrying. The IMAP log file might provide additional information.

Only started happening today.

I have deleted the account and added again. Problem remains.


Comments and changes to this ticket

  • benny

    benny April 27th, 2022 @ 11:25 AM

    • State changed from “new” to “cantreproduce”

    Hmm Server Unavailable seems to indicate that no action would succeed, but other commands will have succeeded if you get to the APPEND command.

    The command itself indicates that MailMate is trying to upload an email which is in your “Sent Items” mailbox of the account. You might want to locate that and delete it to see if it some triggers a server issue. Note that O365 has the non-standard behavior of saving a copy of sent messages itself (when using SMTP) and therefore you should have another (slightly different) copy of the message.

    You can identify non-uploaded messages in the Sent Items folder by enabling the UID column in the message list. Any message without a UID only exists locally and has not yet been uploaded.

    Let me know if this does not help.

  • Matthew

    Matthew April 29th, 2022 @ 09:05 PM

    Thanks Benny.

    I deleted my last dozen sent messages, and that resolved the issue. Thanks so much.


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