On 11/30/2021 03:14 PM, Oswald Buddenhagen wrote:
> On Tue, Nov 30, 2021 at 02:25:57PM -0500, H wrote:
>> After having done so, I have noticed gaps of a couple of months in my Sent 
>> Mail folder yet I have been able to ascertain that the missing e-mails 
>> indeed exist in my mbsync backup.
>>
> did you delete any remaining mbsync state files from the backup _before_ 
> trying to upload it to the new server?
No, I had not done that. I had run the following scripts that I found on 
https://aaronweb.net/blog/2014/11/migrating-mail-between-imap-servers-using-mbsync/
 and restored to a test mailbox on 1&1.

$ find . -type f -name '.??*' -delete
$ find . -type f -name '*U=*' | { while read f; do mv "$f" "`echo $f | sed -e 
's/,U=[0-9]*//'`"; done }
$ find . -type f -name '*U=*'

Then used mbsync to restore to this test mailbox followed by watching what 
thunderbird downloaded. The gaps were there.

Is it correct to do the above? I can try restoring again after deleting the 
.mbsyncstate file but should I also run the scripts above?

In addition, I tried restoring to a local directory in thunderbird using the 
add-on ImportExportTools. That seemed to work fine and Sent emails during these 
two gap periods were indeed restored to the local directory proving that they 
did exist.
>
>> I suspect that there is some incompatibility [...]
>>
> the mailbox formats are irrelevant. both mbsync and thunderbird are talking 
> IMAP with the server, and if there was something wrong with the mails, you 
> should be receiving error messages.
>
> you can re-run mbsync with -V to see if it thinks it synced all messages.
>
>
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