On 24/09/2019 10:14 PM, @lbutlr via dovecot wrote: > Did the target machine already have the user setup? I think dsync wants to > sync mailboxes between configured and working servers with users already > defined.
Yes, of course. And the directory structure was pretty much identical between the two. Which was how I was able to write and run the rsync script. I think at this point, I'm past the dsync problems. That window has closed, and the migration is done, albeit with this irritating re-downloading of email with POP problem. However I'm still keen to get to the bottom of how this whole UID/UIDL/POP3 transaction takes place, so I can understand it for the future, and prevent it happening again. I'm guessing it would be a useful addition to the dovecot documentation as well. P.