I'm facing some problem with emails and attachments. I'm not sure it's dealing with MTU (it is set to the maximum number before a fragmentation occurs).
I have no errors from pop3, but the following message is the best I can show you just to understand my problem. The log shows this:
"imap(roberto.cipollini@allmediasolution.com): Oct 04 17:35:03 Error: Timeout while waiting for release of exclusive fcntl() lock for index file /mail/allmediasolution.com/roberto.cipollini/.INBOX/.imap.index "
I think that the pop3 process is locking the index file (thunderbird was waiting to download the file) and the imap (i tried to get the file from webmail) is going time out.
Can anyone tell me how to fix the time out? any suggestion? do you need more information/logs? can I try different setting in dovecot conf?
thanks for any kind of help. Roberto