How to Find Out What My SMTP Server Is? Step-by-Step Guide


To find out what your SMTP server is, you need to check your email account’s outgoing mail settings or view the email headers of a sent message. In most cases, your SMTP server is listed in your email client under “Outgoing Mail Server (SMTP).” If you’re using a provider like Gmail or Microsoft Outlook with Microsoft 365, the SMTP server is usually something like smtp.gmail.com or smtp.office365.com. You can also identify it by examining the “Received” lines in an email’s full headers.

Now let’s go deeper and walk through all the reliable ways to discover your SMTP server — whether you’re using webmail, desktop clients, mobile devices, or a website.

What Is an SMTP Server?

SMTP stands for Simple Mail Transfer Protocol. It is the server responsible for sending your outgoing emails to recipients.

Whenever you click “Send,” your email client connects to an SMTP server, authenticates your login credentials, and then delivers the message to the recipient’s mail server.

If your SMTP server is misconfigured, emails may:

  • Fail to send

  • Bounce back

  • Go to spam

  • Show authentication errors

That’s why knowing your SMTP server is essential for troubleshooting and proper setup.

Read More: How to Find Out What My SMTP Server Is?

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