What is the port number for SMTP SSL?

Port 587
Port 587 and 465 are both frequently used for SMTPS traffic. Port 587 is often used to encrypt SMTP messages using STARTTLS, which allows the email client to establish secure connections by requesting that the mail server upgrade the connection through TLS.

Is 587 an SSL port?

The question is why is port 587 (Explicit SSL/TLS) the preferred port over port 465 (Implicit SSL/TLS).

What is port number 587 used for?

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.

How do I change my SMTP port to 587?

Windows Mail

  1. Start Windows Mail, click the Tools menu at the top of the window and then click Accounts.
  2. Select your account under Mail, and then click on the Properties button.
  3. Go to the Advanced tab, under Outgoing server (SMTP), change port 25 to 587.
  4. Click the OK button to save the changes.

How do you check 587 port is open or not?

Here’s how to use telnet command to check SMTP port 587 connection:

  1. Write down the following line in your console. Be sure to change the domain name accordingly.
  2. If the SMTP port 587 is not blocked, the 220 response will appear.
  3. If Unable to connect or Connection refused message appears, that means the port is blocked.

What is the difference between port 25 and 587?

Whereas port 25 is the recommended port number for SMTP communications between mail servers (i.e., for relaying messages), port 587 is the one recommended for message submissions by mail clients to mail servers.

How do I test my SMTP port 587?

How do I unblock SMTP port 587?

Open MailEnable and expand Servers→localhost→Services and Connectors. Right click on SMTP service and click on Properties. Go to Inbound and click on Settings under Port Settings area. Select the checkbox for “Listen on alternate port” and type 587 in the field next to it.

How do I unblock port 587?

How to Enable Port 587

  1. To access your Windows Firewall interface, click “Start,” “Control Panel,” “Security” and “Windows Firewall.” Video of the Day.
  2. Click on “Allow a program through Windows Firewall.” This option is found in the upper left region of the window.
  3. Enter the name you want for port 587 in the “Name” field.

Can I use port 587 instead 25?

port 587 should only be used for submissions (i.e., mail client to mail server), port 25 should only be used for relaying (i.e., mail server to mail server communications), and. port 465 should no longer be used at all.

How do I know if my port 587 is enabled?

Is port 587 TCP or UDP?

Service Name and Transport Protocol Port Number Registry

Service Name Port Number Transport Protocol
submission 587 tcp
submission 587 udp
pra-elmd 1587 tcp
pra_elmd 1587 tcp