Contents
What is port number of SMTP?
SMTP servers commonly use the Transmission Control Protocol on port number 25 (for plaintext) and 587 (for encrypted communications).
Should I use port 465?
Port 465 is no longer an accepted standard for SMTP. However, there are some legacy systems that still use port 465 for SMTP, and some help pages on the internet still suggest port 465 as the recommended setup. However, IANA has since reassigned this port for a different use, so it should no longer be used for SMTP.
What is the server port for outgoing mail?
Default Ports:
| Default Ports: | Server: | Port: |
|---|---|---|
| SMTP Server (Outgoing Messages) | Non-Encrypted | 25 (or 587) |
| Secure (TLS) | 587 | |
| Secure (SSL) | 465 | |
| POP3 Server (Incoming Messages) | Non-Encrypted | 110 |
Which is SMTP port do you use for email?
Port 587: The standard secure SMTP port Modern email servers use port 587 for the secure submission of email for delivery. For example, if you use an email client software like Outlook or Apple Mail, it most likely is configured to use this port to send your messages.
What can SMTP port 25 be used for?
SMTP port 25 continues to be used primarily for SMTP relaying. SMTP relaying is the transmittal of email from email server to email server. In most cases, modern SMTP email clients (Microsoft Outlook, Mail, Thunderbird, etc.) shouldn’t use this port.
Which is the oldest port for SMTP relay?
Port 25 was established all the way back in 1982, which makes it the oldest SMTP port. Port 25 is still known as the standard SMTP port and it’s used mostly for SMTP relay.
Where can I find the hostname and port number for SMTP?
If you are subscribed to a hosted email relay service you can get the SMTP server hostname and port number from the support page of your email service. If you run your own SMTP server you can find the configured SMTP port number and address from the SMTP server configuration.