At 8:36 PM -0500 2005-02-17, George Theall wrote:
Nope, it's not blocked (I'm on MCI).
You're looking in the wrong direction. I was talking about inbound connections *to* his address, not outbound connections *from* his address. Many large ISPs tend to block things like port 25 in both directions, or do transparent proxying.
Moreover, I know that many cable modem providers implement different policies in different areas, so while one group of Comcast customers might not have blocking or transparent proxying that they have to worry about, others might. At the very least, large providers like Comcast do not necessarily implement the same policies across the board in unison, instead they roll out policy changes, and while a certain group of customers may not yet have a given problem while others do, given enough time, the policy change will be rolled out everywhere.
Why don't you send your mail through Comcast's mail servers? You can have Mailman do this by setting DELIVERY_MODULE = 'SMTPDirect' and adjusting SMTPHOST in Mailman/mm_cfg.py.
Again, we were talking about inbound, not outbound. But outbound is also a legitimate issue, and one that the OP should be concerned about. Again, many providers will block port 25 on outbound connections, or transparent proxy them. In addition, many providers place limits on the number of messages you can send in a given amount of time, or the total amount of mail volume (in bytes) that can be generated in a given amount of time.
Mailman FAQ entries <http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq04.051.htp> and <http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq01.017.htp> are relevant.
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