Smtp Port 587 Not Working

Why Smtp Port 587 Not Working?

SMTP stands for Simple Mail Transfer Protocol. SMTP is one of the basic standards the mail servers use to send emails from one platform to another. It is primarily used in applications like Apple Mail and Outlook to send emails in a much secure way and relay them to other mail servers. These email applications rely on other standards like IMAP and POP3 to retrieve those emails. We have givien steps to fix why Smtp Port 587 Not Working.

SMTP relies on domain names and Internet addresses to know where to send the messages.

There are different SMTP ports like 25, 465, 587, and 2525. These ports are standard, but only the SMTP port 587 is considered for modern use.

Port 587: Modern email servers use port 587 for the secure submission of email for delivery. It is used in a majority of servers and helps to reduce the rate of rejected messages.

Most email users have been raising issues related to port 587 not working. Suppose you are wondering how; here are the simple steps to resolve the issue. For example, let’s see an error message for Gmail. If the SMTP 587 port does not work, you will see “cannot connect to, port 587: Connection timed out’ exitcode=EX_TEMPFAIL”.

Fix 1: Test the connection

The only solution to the issue is to check and see if SMTP port 587 is blocked, and find why Smtp Port 587 Not Working.

  • Step 1:Turn on your Windows computer.
  • Step 2:Open the Run Command window (Windows + R).
  • Step 3:Wait for Run Command to open.
  • Step 4:You can use the Telnet check command to see the SMTP 587 port connection.
  • Step 5:Type telnet yourdomain.tld 587 and press Enter.
  • Step 6:If you see the response as 220, it means that the SMTP 587 port is working just fine.

This can resolve the SMTP port 587 not working issue. If not, proceed to the next fix.

Fix 2: Check SMTP settings

If you have misconfigured the SMTP settings for your email, there is a chance that Port 587 won't work. Here are some SMTP settings for popular email clients.


  • Step 1:Server:
  • Step 2:Port: 587
  • Step 3:Authentication: TLS


  • Step 1:Server:
  • Step 2:Port: 587
  • Step 3:Click the checkbox for TLS encryption
  • Step 4:Authentication required


  • Step 1:Server:
  • Step 2:Port: 587
  • Step 3:Encryption: TLS
  • Step 4:Alternate Port number: 25 (with TLS or SSL)

Once you check with these settings and save the changes, you can try to send emails from your email client. You will notice that the configured SMTP port 587 not working issue and it will work properly without hassles. For more assistance related to SMTP, click the CALL button pinned to this page. Our technical team will resolve the matter at hand.

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