If you send mail through an app or website, you need the right SMTP port number. Without it, your messages may fail or run into security issues. The good news is that finding your SMTP port number is easy. You can check it through your email provider, hosting panel, or a quick test on your computer.
Below are the simplest ways to find your SMTP port number. These steps work for Gmail, Outlook, Yahoo, hosting mail, and most other services.
Check your email provider’s help page
Almost every provider lists its SMTP port number online. Look for the section called “SMTP settings” or “Outgoing mail settings.”
Common SMTP port numbers:
- Gmail uses port 465 or port 587.
- Outlook uses port 587.
- Yahoo uses port 465 or port 587.
If you use a custom domain, your hosting company will tell you the correct port.
Check the SMTP settings in your email app
If your mail account is already added to your phone or computer, you can see the SMTP port number inside the outgoing server settings.
Look for:
- SMTP server
- Outgoing server
- Port
You will see a number like 25, 465, or 587.
Check your hosting control panel
If your domain uses cPanel, Plesk, or another dashboard, you can find the SMTP port number under Email Accounts or Mail Client Configuration.
Hosting pages usually list:
- SMTP server name
- SMTP port number
- Security type (SSL or TLS)
This is helpful when you need to set up mail for a website or app.
Use a quick command to test the port
If you are not sure which port is open, you can test it from your computer.
Windows PowerShell:
Test-NetConnection -ComputerName smtp.example.com -Port 587
macOS or Linux:
telnet smtp.example.com 587
If the test connects, then that SMTP port number works on your server.
Check your service provider’s support team
If nothing else works, you can contact your email or hosting support team. Give them your domain and they will confirm the correct SMTP port number for your setup.
Why SMTP port numbers matter
- SMTP port numbers help mail servers send messages safely.
- Port 25 is older and often blocked.
- Port 465 and port 587 help protect your messages through encryption.
- Using the correct port improves mail delivery and reduces errors.
FAQs For SMTP Port umber
Q: What is the default SMTP port number?
Many systems use port 587 for secure mail. Some older setups use port 25, but it is blocked in many networks.
Q: How do I know if my SMTP port is blocked?
Run a port test. If the test fails, the port may be blocked by your network or hosting provider.
Q: Which SMTP port is best for secure mail?
Port 465 or port 587 works best for secure SMTP with SSL or TLS.
Q: Can I use more than one SMTP port?
Yes. If one port fails, you can try another supported port from your provider.
Q: Where can I find SMTP port settings for my website?
Check your hosting panel under Email Accounts or Mail Configuration.
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