[IMail Forum] Undeliverable Mail Problem

[Serhan Sevim]

Guys, Our Imail server v7.06 can not send emails to specific domains while our sendmail server can. -Even sendmail server doesn't have PTR record set up, but Imail has. - They both use same DNS server. It takes some time in the Imail server to send the message then it just bounces back to me saying, "undeliverable to [EMAIL PROTECTED]" I tried to send the mail to the exact recepient via sendmail server, and it sent it with no problems. I'm also 100% sure that we're not SPAM blacklisted by any of the receiving hosts.. Am I missing something here? Thank you.