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I have an application (written in PHP) which sends email using SMTP and runs on the same system as the email server. Are there any security concerns about using port 25 on localhost rather than port 587 on the server's external IP with TLS?
Thanks
a port is a port. There is no difference between port 25 instead of port 587. – Ramhound – 2014-06-27T13:40:06.663
There is a difference, because the mail server will not accept TLS on port 25. – Keith M – 2014-06-27T17:26:02.227
That sounds like an server application limitation and/or a configuration problem. I was speaking from a pure technical perspective. – Ramhound – 2014-06-27T22:35:37.350
I know what you mean, but a port is just an advertised connection to a server, so its behavior is defined by that server. That's not really an application limitation and/or configuration problem. – Keith M – 2014-06-29T05:45:29.547