SMTP settings for Security and Authentication options - what options with accompanying ports are valid?

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asteroid

Registered
Jun 28, 2022
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Sometimes I see settings that are not entirely lined up with the settings that I'm normally familiar with such as a request on a website SMTP module to enter values for the "Security" and "Authentication".
  • Options for Security: None, SMTPS, STARTTLS
  • Options for Authentication: None, Plain, Login, CRAM-MD5, OAuth 2.0
As an example, here's one particular request for such info:
2022-06-28_180950.jpg

As for the Port number, I usually assume 465, but I also be believe 587 can also be used for STARTTLS from some of what I've read, but I think it's also NON-SSL... So I don't know if that's actually valid.

Could someone please explain what options are valid and with which port(s) they're valid?

Any and all combinations would be really appreciated.
 
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cPRex

Jurassic Moderator
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Oct 19, 2014
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Hey there! This link, once you click the orange button, gives a list of the protocols and ports that are supported at this time:


Can you read that and see if that's what you're looking for?