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List: nanog
Subject: Re: txt.att.net operators
From: Christopher Morrow <morrowc.lists () gmail ! com>
Date: 2010-05-26 18:11:39
Message-ID: AANLkTikSy7dI_NAf5xPueQJU1TAkr5eZKiVlEntJneGv () mail ! gmail ! com
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On Wed, May 26, 2010 at 11:17 AM, Mike Walter <mwalter@3z.net> wrote:
> We have been struggling to locate someone at AT&T that handles the
> txt.att.net servers. We have clients in our data center that can no
> longer send emails to mobile phones via 10digit@txt.att.net. We have
> contacted AT&T and they say there is no problem on their end. We can
> ping the server, but simply cannot connect to port 25. We have checked
> all firewalls of each client. Some ranges of IPs work and others don't.
> Looking for someone with a clue who can assist.
this is not a guaranteed service, nor does it have an official SLA,
and inbound mail/connections from louder speakers are often just
dropped, either at the TCP layer, or at the application layer (even
after what seems like a completed SMTP conversation.)
If you depend upon SMS for things, smtp -> sms gateways at the
provider aren't reliable enough.
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