Re: New Backup Issue

> On 11/06/2026 00:25 EEST Doug Hardie via dovecot <[email protected]> wrote:
> 
>  
> I have dovecot using maildir storage on the mail machine.  I have an external drive directly connected to use a backup for the mailboxes.  Doveadm backup works perfectly for this setup.
> 
> I also have two external backup servers.  Backup to those tends to fail with a variety of errors.  I deleted the Maildir directory on the backup servers and created the original backups with doveadm backup.  No issues were reported.  However, the next backup generates errors:
> 
> dsync-remote(jeanne)<HV6JE+i/KWo0NwAAq6l46g>: Warning: Deleting mailbox 'INBOX': UID=11166 GUID=1712570780.M604032P10319.mail,S=99689,W=101000 is missing locally
> dsync-remote(jeanne)<HV6JE+i/KWo0NwAAq6l46g>: Error: Couldn't delete mailbox INBOX: INBOX can't be deleted.
> dsync-local(jeanne)<HqU9Aei/KWoBMAAAZU03Dg>: Error: Remote command returned error 65: ssh sermons doveadm dsync-server -ujeanne -U
> dsync-remote(beneke)<eARRAem/KWpdNwAAq6l46g>: Warning: Deleting mailbox 'INBOX': UID=232 GUID=1641564460.M859673P8687.mail,S=5917,W=6035 is missing locally
> dsync-remote(beneke)<eARRAem/KWpdNwAAq6l46g>: Error: Couldn't delete mailbox INBOX: INBOX can't be deleted.
> dsync-local(beneke)<mw5bM+i/KWoJMAAAZU03Dg>: Error: Remote command returned error 65: ssh sermons doveadm dsync-server -ubeneke -U
> dsync-remote(doug)<6gmSJ+m/KWp7NwAAq6l46g>: Warning: Deleting mailbox 'INBOX': UID=92440 GUID=1465118975.V4eI7cfa32M232845.mail is missing locally
> dsync-remote(doug)<6gmSJ+m/KWp7NwAAq6l46g>: Error: Couldn't delete mailbox INBOX: INBOX can't be deleted.
> dsync-local(doug)<hwsCH+m/KWoNMAAAZU03Dg>: Error: Remote command returned error 65: ssh sermons doveadm dsync-server -udoug -U
> 
> There is always one error per user, but they are different between the two backup machine.  With the first error, I found the message 1712570780.M604032P10319.mail,S=99689,W=101000 in the mail server cur directory and deleted it.  That messge did not exist in the backup server.  I ran backup again and no issues.  However, the next backup produced the following error:  
> 
> dsync-remote(jeanne)<dNWXGZbUKWoaOgAAq6l46g>: Warning: Deleting mailbox 'INBOX': UID=11167 GUID=1712574432.M425061P11306.mail,S=45149,W=45775 is missing locally
> dsync-remote(jeanne)<dNWXGZbUKWoaOgAAq6l46g>: Error: Couldn't delete mailbox INBOX: INBOX can't be deleted.
> dsync-local(jeanne)<Jg3tCZbUKWp5NQAAZU03Dg>: Error: Remote command returned error 65: ssh sermons doveadm dsync-server -ujeanne -U
> 
> That message is in the cur directory on the mail server.  It is not in the backup server.
> 
> I don't understand the message that those files are missing locally (primary mail server I presume) when they are actually there and missing on the remote server.  I don't know why they didn't get copied originally.  The first email was recieved on Mon,  8 Apr 2024 so it can't be a timming issue.
> 
> -- Doug

Is it possible that the local backup has been modified? Usually these are fixed by removing the backup and starting over. 

Aki

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