What is Port 2525 used for?

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What is Port 465 used for?
Port 465 was originally registered for SMTPS (SMTP over SSL). After a brief period in that role, port 465 was reassigned for a different use and deprecated.

Despite this, many Internet service providers and cloud hosting providers still support port 465 for SMTP submission.

Port 2525 is not an official SMTP port (as recognized by the IETF or IANA). However, it is still popularly used as an alternative to port 587 for SMTP submission, and most Internet Service Providers and Cloud Hosting Providers do support port 2525 for SMTP.

If port 587 is blocked, port 2525 is a good alternative.

Which SMTP port should you use?
We've already talked about this, but let's recap how to finland phone number data choose the right SMTP port because it's important to make the right choice.

If you're configuring your WordPress site or email client to send emails via SMTP (submission), you'll almost always want to use port 587 . Again, this is the default SMTP port for sending and supports secure transmission over TLS.

If port 587 is blocked for some reason, port 2525 is a common fallback. Again, this is not an officially recognized SMTP port, but it is commonly used and supported by most providers.

Although many providers still support port 465 for SMTP, it is no longer an accepted standard and you should always try using ports 587 and 2525 before using port 465.

Finally, although port 25 is commonly used for SMTP relay, it should not be used when setting up an email client or a WordPress website because most ISPs and cloud hosting providers block port 25.