I am running RHEL with postfix and dovecot. I obtain mail via pop3 with my BB, Thunderbird and other users get it with Gmail. It works 90% of the time. Right up until there is a medium sized email that clogs the pop3. I'm not talking a large email it'll hang on less than 2 mb. If it were just one individual I wouldn't worry about this much but it is uniform across many users, many receiving devices (outlook/gmail/Blackberry/thunderbird/etc), and it really doesn't have to be a very large attachment to create this hang and we then have to use squirrel mail to blow the offending email away and all is well again. Any ideas?