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My ISP blocked my port 25 (comcast), so I can't send mailout (via postfix). Can I modify to send mail out on 587 or so? I'm having issues figuring it out correctly.
MKN Web Solutions
Posted 2011-05-18T04:26:14.247
Reputation: 101
Port 25 blocked, change ubuntu mailout to open port
Answers
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May be this link will help you: http://www.freebsddiary.org/postfix-transport.php
anubhava
Posted 2011-05-18T04:26:14.247
Reputation: 930
1This is a great article, but it's extremly dated. Anything for Ubuntu 10+ ? – None – 2011-05-18T05:16:01.050
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You may want to use port 587 as the submission port for SMTP mail rather than 25 (many ISPs block port 25), you will need to edit /etc/postfix/master.cf to uncomment the relevant line for port 587 there.
Jhourlad Estrella
Posted 2011-05-18T04:26:14.247
Reputation: 129
I set up 587 in the masterc.cf; but for some reason it's still pushing on 25 (i commented out the smtp line for 25) – None – 2011-05-18T05:16:31.160
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You can configure Postfix to send mail to port 587 of other servers. The problem is that they won't accept it. 587, the "Message submission" port, is strictly limited to users sending outgoing mail, and always requires authentication; for mail incoming from other servers, only port 25 is used.
user1686
Posted 2011-05-18T04:26:14.247
Reputation: 283 655
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Do you want to relay mail through the Comcast mail server? If so, checkout this article.
Timofey Stolbov
Posted 2011-05-18T04:26:14.247
Reputation: 101
If I relay through comcast, does the from come from the comcast acct email? I've got a very large email qty to shoot out to my subscribers. – None – 2011-05-18T05:15:17.417
@Michael I don't know for sure. You can easily test this. – Timofey Stolbov – 2011-05-18T05:22:01.153
It depends on your mail routing scheme. Please show how your postfix configured. – Timofey Stolbov – 2011-05-18T04:33:46.427
it's the default configuration – None – 2011-05-18T04:48:59.170