what ports to forward for mac mail server

The purpose was to establish a port for SMTP to operate using Secure Sockets Layer (SSL).

Instead, the Internet Assigned Numbers Authority (IANA), who maintains much of the core internet infrastructure, registered port 465 for SMTPS. Interestingly, port 465 was never published as an official SMTP transmission or submission channel by the IETF. Of course, just as there are multiple computer ports, there are many SMTP ports that can be used. An SMTP port is a combination of both: a port designed to send email through a network and to its recipient. Computer ports are how individual computers connect to a network and complete electronic processes. SMTP stands for Simple Mail Transfer Protocol-put simply, it’s the process by which emails are sent across the Internet. What is an SMTP port?īefore our trip through history, we’ll clarify some basic definitions. If you're not a history buff, go to 'Which SMTP port should you use?' for the most common SMTP ports. To ensure connectivity to our Simple Mail Transfer Protocol (SMTP) endpoint, Mailgun offers multiple SMTP port options, but which one should you use to send email messages? We’ll take a historical look at each SMTP port and then we'll discuss today's methodology for outgoing mail usage. It's a common question that we receive here at Mailgun about SMTP port numbers.

What ports to forward for mac mail server