Question about Computers & Internet
Some ISPs will block your ability to send mail via SMTP client on your machine. If the email server is different from the one offered by your ISP.
the typical port for the SMTP service is TCP port 25. To allow your outgoing email to route past your ISP, change this to TCP port 587.
On Linux and Mac OS/X, this is found in file /etc/services
On Windows XP, try 'windows\system32\drivers\etc\services'
Locate a line such as
smtp 25/tcp mail
and change it to
smtp 587/tcp mail # port for outgoing mail
Posted on Sep 09, 2010
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Posted on Jan 02, 2017
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