[Dovecot] Failing: doveadm sync <--remote host--> dsync mirror

[Timo Sirainen]

On 3.3.2012, at 20.03, Michael Grimm wrote:

> 	vmail> dsync -v -f -u test mirror ssh vmail at remote-host.tld dsync -v -f -u test
> 	dsync-local(test): Error: remote: dsync: illegal option -- f
> 	doveadm dsync-server [-u <user>|-A] [-S <socket_path>] 
> 	dsync-local(test): Error: read() from worker server failed: EOF
> 
> If I do omit the remote '-f' the old syntax is being accepted. Thanks for fixing that.

Right, the remote -f parameter doesn't do anything. But it's anyway now allowed:
http://hg.dovecot.org/dovecot-2.1/rev/9c6eeeb810c0

>> doveadm sync -f -u test test at remote-host.tld
> 
> 	vmail> doveadm sync -f -u test ssh vmail at remote-host.tld
> 	dsync-local(test): Error: remote: dsync-server: Command not found.
> 	dsync-local(test): Error: read() from worker server failed: EOF

Remove the "ssh" parameter from the middle and change vmail@ to test@

> Users are virtual ones at both mail servers, and vmail is the only system user to run ssh. Thus I 
> can't test user suggestion. But it's ok to add a 'doveadm dsync-server -u test'.

In this syntax the test@ means Dovecot user, not system user. Although I'm not sure if that's a good idea. In the latest hg version the preferred way is:

doveadm sync -f -u test remote:vmail at host

It automatically adds the remote -u test.

> Now, I will stick to 2.1.x because syncing is done without loss of mails (after 10 days of testing).
> The only inconvenience remaining is reappearing of deleted and "undeletable" mail. But it seems that 
> I'm the only one reporting that. How could I help to debug this issue?

Is anything else besides Dovecot modifying the mailboxes? Especially deleting mails? No cronjobs or other scripts that "rm" mails?