I have read the information previous supplied and found some useful tidbits/information. This is to better explain what I am trying to accomplish server alarm.home.org <-- fetchmail <-- 1@example.org Dovecot/SMTP <-- 2@example.org <-- 3@example.org <-- 4@example.org The fetchmail delivers all emails to oldfart@home.arpa (dovecot on alarm.home.arpa) (smtp on alarm.home.arpa) ^ | | Thunderbird then reads the account oldfart@home.arpa (IMAP) Reply to 3@example.org --> www.twc.com smarthost Reply to 1@example.org --> www.twc.com smarthost New message to arch-general@lists.archlinux.org from pocket@alarm.arpa So SMTP needs to rewrite oldfart@home.arpa to 3@example.org use 3@example.org credentials to www.twc.com rewrite oldfart@home.arpa to 1@example.org use 1@example.org credentials to www.twc.com rewrite oldfart@home.arpa to pocket@example.org use pocket@example.org credentials to www.twc.com Dovecot to use PAM to validate user oldfart, Maildir on /srv/Mail/<user> SMTP to use dovecot credentials STARTTLS/TLS connection required to www.twc.com No TLS/SSL required on the local network, but if it is required to do so then so be it. Procedure: Step 1. create certs Step 2. install/configure dovecot Step 3. install/configure a SMTP daemon I hope this makes this more clear of what I am trying to accomplish. All help welcomne Thanks for your help -- Hindi madali ang maging ako