What is Port 2525 and why does Mailgun use it?

What is Port 2525 and why does Mailgun use it?

Instead, Mailgun provides it as an alternate port, which mirrors port 587, in the event the above ports are blocked. Because 2525 is a non-traditional high port number, it is typically allowed on consumer ISPs and Cloud Hosting providers, like Google Compute Engine.

What is a saej 2244-1 port?

This port is also called the SAEJ2244-1. This port has the identification notch that identifies it as a metric port. This port tool is also called the SAEJ2244-1. This port tool has a large spot face diameter but does not have the identification notch that identifies it as a metric port.

What are service names and port numbers?

Service names and port numbers are used to distinguish between different services that run over transport protocols such as TCP, UDP, DCCP, and SCTP. Service names are assigned on a first-come, first-served process, as documented in [ RFC6335 ].

Should I use port 587 or 465 for submission?

While you can use other ports for submission (more on those next), you should always start with port 587 as the default and only use a different port if circumstances dictate (like your host blocking port 587 for some reason). Port 587 also supports TLS, which means that you can securely submit mail. What is Port 465 Used For?

What ports does Mailgun support for SMTP?

All Mailgun customers should consider using port 587 as their default SMTP port unless you’re explicitly blocked by your upstream network or hosting provider. Port 2525: This port is not endorsed by the IETF nor IANA. Instead, Mailgun provides it as an alternate port, which mirrors port 587, in the event the above ports are blocked.

What are the alternatives to SMTP port 587?

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

Does Mailgun support TLS connections?

Mailgun supports TLS connections, which you can verify by connecting and issuing an “ehlo” from a command line interface. The resultant “250 STARTTLS” confirms the endpoint accepts TLS connection requests.