I am working on a service which needs to send SMTP messages.
With all the concern about improper forwarding of email
messages, I want to know: to which SMTP server is it proper
for me to send a given message?
(Here is a similar question, worded another way) When Sendmail
sends a message to [EMAIL PROTECTED], does it:
1) query which mailserver serves dog.org, and then connect to
that mailserver to send rover's message? or
2) connect to a mailserver run by the ISP, from which this
Sendmail-hosting organization buys its Internet connection,
and send the message to [EMAIL PROTECTED] through that server?
I have noticed that I can do 2). With my DSL account with
Sprint/Earthlink, the mailserver mail.earthlink.net always
seems to accept the test messages which I send out through
it. But I wonder if that is the normal and the right way. I
have tried 1) a few times, with limited success, so I wonder
if 1) is the normal and correct way.
Thank you,
Rich Hammer
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