Someone has posted the sendmail answer.I've done quite a bit of searching and reading but haven't found an answer yet.
AOL.com and RoadRunner block incoming mail from IP's that belong to residential customers- my ISP's server is a bit flaky at times.
I want to instruct sendmail (can be convinced to use postfix easily), to
forward mail for specific domains to the ISP's SMTP server, and all
other mail through my own sendmail.
I recently switched to postfix, so here is the postfix solution in case you are interested:
edit /etc/postfix/transport and add the entries for special handling as follows:
aol.com my.isps.mail.server roadrunner.com my.isps.mail.server
Then type "postmap transport" and you're good to go
Joe
