Hi, I'm using Centos 4.4 (which is redhat linux but free) that comes with dovecot-0.99.11-4.EL4. I have done a clean reinstall of the server and I have users reporting that everytime they hit "send/receive" in their outlook or outlook express software, they get the same messages, as well as the new ones, over and over again.
I use postfix + dovecot and only the pop3 protocol. My dovecot.conf has the following relevant entries
default_mail_env = mbox:~/mail/:INBOX=/var/mail/%u client_workarounds = oe6-fetch-no-newmail outlook-idle outlook-pop3-no-nuls mbox_locks = fcntl
everything else is at default value.
Also, we do not upgrade dovecot because it is not part of the upstream provider, and we do not want to break binary compatibility updates.
Thanks for your guidance.