OK, now I have the weirdest exchange problem ever!

[Butters]

Yesterday I asked how to set up a group email account from my external web domain mydomain.com. The internal domain is domain.com.

Every user within domain.com recieves email as intended. The group email is [email protected]

Now, if I email this from either gmail.com or googlemail.com all of the recipients receive it without any problem.

However, If I email it from any other address the messages do not get through and the sender receives absolutely NO messages back at all.

I've tried btinternet.com, hotmail.co.uk, etc and none of them seem to get through or have errors returned.

Does anyone have any ideas? I opened Port 25 on the NAT (even though everyone was receiving before) and still nothing. Got me stumped

 

[Butters]

Spam/Junk Filters?

Are the emails hitting the exchange server?

What version of Exchange?

Exchange 2003

How can I tell if they are hitting the server and why would all popular domains be in the SPAM list but not gmail?

Horribly confused, thanks so far

 

[Butters]

I think I found the problem.

The IP address of the server is Dynamic and was tracked by dnsalias.com

If a company did reverse lookups then it was getting flagged as SPAM as it was coming back as a dynamic address.

I've skipped the DNSalias part for the moment and have contacted my ISP to get a static address assigned.

Thanks