zentara,

Most ISPs give an alternate port( i.e. 587, ... ) to their own users.

MTA to MTA traffic is on port 25, but many ISPs firewall port 25 to a spam/virus scanning machine(s), and use DNS 'MX' magic to make it work!

If an ISP completely blocked port 25, they wouldn't have many emails to worry about.

"Well done is better than well said." - Benjamin Franklin

In reply to Re^2: Mail::Sender Problems. by flexvault
in thread Mail::Sender Problems. by Steve_BZ

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