Exchange 2003 Hopping mail between ISP and server
Posted on 2009-07-15
I seem to have mail bouncing from our exchange 2003 server back to the ISP indefinitly, I found out why this was happening : The e-mails that are bouncing contain invalid adress's in the CC field or the To field and vice versa. The system is accepting the valid one's and sending the invalid one's back to the ISP. Then exchange connects again, downloads the mail and the process starts all over again. Filtering is switched on for recipients and SMTP as well as a postmaster box to send undeliverable mail. But the symptoms continue....