watermom22 said:
When sending mail, I get a "551 not our customer" error. What is this,
and
how can I fix it?
You are attempting to connect to an SMTP server while you are *not* on their
network. They permit access ONLY to their customers, and that ain't you.
They refuse off-domain connects to their SMTP server to prevent abuse by
spammers. You didn't pay for access to their server and they aren't going
to let everyone in the world abuse it.
They may, also at their option, provide a means of accessing their SMTP
server from off-domain, like when you travel, but often it requires using
non-standard ports and using SSL, but you'll have to talk to the owner of
the SMTP server, providing you are actually authorized to use it, to find
out the details. For now, use the SMTP server for the ISP to whom you
connect (i.e., use an on-domain server).
It appears you are a Comcast customer. An example of off-domain access to
their SMTP server would be you while at work trying to connect to their SMTP
server. You are coming from your company's network. You are NOT on
Comcast's network. They haven't a clue who the hell you are because you are
coming from the outside where you were never authenticated to use their
network or their servers. Some ISPs will provide an allowance on request
for specific IP addresses to permit off-domain access to their mail servers,
but Comcast is too fat and dense to bother with single-user requests. You
will need to follow Comcast's instructions on how to access their servers
when you are off their network; see
http://www.comcast.net/help/faq/index.jsp?faq=EmailOutlook_Express17717.
Obviously if you don't have an account with Comcast to use their resources,
your login authentication will still fail.
