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How to send .Mac mail when SMTP is blocked
Authored by: AaronAdams on Jan 18, '06 07:23:37AM

If SMTP over port 25 is being blocked, you can use .Mac's alternate SMTP port.

http://docs.info.apple.com/article.html?artnum=75124

The article says it applies to 10.4.2 or earlier, but it applies to 10.4.3 and 10.4.4 as well.



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How to send .Mac mail when SMTP is blocked
Authored by: mm2270 on Jan 18, '06 07:53:05AM

That's exactly right. Our company blocks port 25, as do many providers, because that is the most common port used by spammers that take over a system to send mass emails out. Use port 587 and it should allow it to go through. Much easier than savings emails as drafts, etc.



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How to send .Mac mail when SMTP is blocked
Authored by: slowe on Jan 18, '06 11:21:59AM

The alternate SMTP port described in your hint and referenced in the Apple document is a proposed standard from the IETF for mail submission. It's intended to be used by MUAs (e-mail clients) for submitting messages to MTAs (e-mail servers), and it's strongly recommended that authentication and encryption (via STARTTLS) be required. The idea is that this allows ISPs to tightly control server-to-server traffic (which will still occur over TCP port 25) while permitting client-to-server traffic (which will now occur over TCP port 587).

Note that .Mac is not unique in their use of port 587; Gmail also supports it.



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