Probably on server side ... the problem was only on big mailboxes which is used by IMAP, so there is no problem and we have already migrated all to dovecot. ;) Thanks for your reply.
On 31.8.2012 15:46, Timo Sirainen wrote:
On 23.8.2012, at 16.40, TeTeHacko wrote:
I have problems with pop3 migration, the server disconect the dovesync when fetching mails after 5 minutes with this error in server log:
xx.xx.xx.xx [28F4] 11:54:05 <<< RETR 6548 xx.xx.xx.xx [28F4] 11:54:05 >>> +OK 47522 octets xx.xx.xx.xx [28F4] 11:54:05 <<< RETR 6549 xx.xx.xx.xx [28F4] 11:54:05 >>> +OK 355289 octets xx.xx.xx.xx [28F4] 11:54:05 <<< RETR 6550 xx.xx.xx.xx [28F4] 11:54:05 >>> +OK 9638 octets xx.xx.xx.xx [28F4] 11:54:05 <<< RETR 6551 xx.xx.xx.xx [28F4] 11:54:05 >>> +OK 2188 octets xx.xx.xx.xx [28F4] 11:59:05 >>> -ERR Command unrecognized: "" xx.xx.xx.xx [28F4] 11:59:05 *** info@istan.cz 6551 477693894 00:12:55 ERROR xx.xx.xx.xx [28F4] 11:59:05 Disconnected
Looks like a bug. But in Dovecot POP3 client or the POP3 server? Apparently either Dovecot sends an empty line after RETR or the server thinks Dovecot sends it. Can you get the actual TCP traffic logs? and/or set pop3c_rawlog_dir and see if it's there.