[ExI] META: proper authentication

Mike Dougherty msd001 at gmail.com
Tue Dec 1 14:04:35 UTC 2009


On Tue, Dec 1, 2009 at 7:01 AM, BillK <pharos at gmail.com> wrote:

>
> The problem isn't reva.xtrmeunix.com. - It's you.    :)
>
> When you swap around networks, you have to change your outgoing
> mailserver to use the mailserver for the network that you're on. This
> is a common problem on laptops, for example. Connecting from office or
> home means using a different mailserver.
>
> How you do the change depends on what software you're using.
> Your tech department might be able to set up an automated solution for
> you, to save you tinkering with SMTP setup every time you move.
>
The tech department may already have provision for dealing with this
situation.  SMTP is normally available on port 25 of the email server.  Many
ISP either block or proxy this port.  If your email administrator already
added support for SMTP on another port  (like 2525 or 8025, etc.) then your
various ISP should ignore this non-standard-port traffic and allow you to
send messages directly to your own mail server - where you will
authenticate.

There is also the possibility that reva.xtrmeunix.com doesn't accept mail
from your server because your email administrator is lax on providing proper
proof of its legitimacy and perhaps the admin at xtrmeunix.com is
particularly aggressive.  Sender policy framework (SPF) is a publically
available text record in DNS that identifies what IP addresses are allowed
to send mail for your domain.  Due to a long adoption phase, most email is
accepted when this information is unavailable - however it's been
commonly adopted for a while now, so maybe xtrmeunix.com is rejecting your
email because it thinks you are a spammer masquerading as yourself.
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