Hi Brett,
Likewise, we've been trying to get through to someone at AT&T to help
a new customer whose mail server seems to be getting blocked by AT&T.
As far as we can tell it's an IP-based block and the customer just
received their IP allocation through an ARIN transfer from another ISP.
Ha
Hi Brielle,
I'm in the same boat. For a month now I've been trying to find a
Spectrum/Time Warner/Roadrunner email contact to tell me why they are
blocking my mail server (and , in fact, my entire /20 range), with a
similar error:
Server's greeting was '554 dnvrco-cmimta08 esmtp ESMTP serve
