Need help

[Thinowns]

Hello,
I have a customer that has had many of its email accounts blacklisted. (554 Denied [CS] (Mode:normal)) AT&T is the provider. The blacklist info comes from AT&T but calling AT&T is nothing but an exercise in futility. They say that Yahoo is in control and to email Yahoo. We have done so. It has been 5 days since.
We can email if we go thru the web server.
Any thoughts?
Thanks

 

[sella.ca]

554 Message is not RFC compliant

The format of the email is likely missing something in the headers. Assuming you're using a custom email app, try a different client. If that works, then it's the software sending the email, and not a network/client issue. Check out 'rfc 2822' (sorry can't link yet)

Might be missing a message-id or date. If the client is connecting directly to receiving smtp servers, then you must make sure all is according to rfc for the most part; otherwise, the sending smtp server could be an issue, though would likely fill in some missing headers...

---------- Post added at 03:45 PM ---------- Previous post was at 03:35 PM ----------

Opps. Old post... Must check dates