What is my SMTP server name?

An SMTP server is a server that handles sending outgoing email. When you compose an email in your email client or webmail, the SMTP server takes that email and communicates with the recipient’s incoming mail server to deliver your message.

What is my SMTP server name?

Some key things to know about SMTP servers:

  • They are used for sending email only. Incoming email is handled by POP or IMAP servers.
  • Popular email providers like Gmail, Outlook.com, and Yahoo Mail have their own SMTP servers.
  • You can also set up a custom SMTP server to use with email clients.
  • SMTP servers require proper configuration with username, password, and other settings to send email.

How Email Works

Behind the scenes, this is what happens when you send an email:

  1. You compose a message in your email client or webmail and hit send.
  2. Your email client connects to your outgoing SMTP server.
  3. The SMTP server communicates with the incoming mail server of the email recipient and sends your email message.
  4. The incoming mail server delivers your email to the recipient’s inbox.

So in summary, your SMTP server name allows outgoing email delivery between your device and email provider.

Finding Your Email SMTP Server

To find your SMTP server name and settings, you will first want to identify your email service provider:

For common email providers:

  • Gmail: smtp.gmail.com
  • Outlook.com/Hotmail: smtp-mail.outlook.com
  • Yahoo Mail: smtp.mail.yahoo.com
  • iCloud: smtp.mail.me.com

For ISP email addresses:

Email addresses from internet service providers like Comcast, AT&T and Verizon use the ISP’s SMTP servers. You can usually find this information through their support site or by contacting their customer service team.

For work/school email addresses:

Your organization manages its own email servers. Consult with your IT department to get the SMTP name.

Once you know your email provider, you can configure that SMTP name within your email client program (e.g. Microsoft Outlook, Apple Mail). This allows your client to connect to the appropriate server for sending outgoing messages.

Tip: Always use encryption options like SSL/TLS if available when setting up SMTP server settings for better email security.

Locating Your SMTP Settings

In addition to the server name, most SMTP servers require extra settings like the following to send outgoing mail:

  • Encryption method – Common options are None, SSL (Secure Sockets Layer), and TLS (Transport Layer Security). This allows secure connections between servers.
  • Authentication – The login credentials for the SMTP server. For Gmail this would be your full Gmail address and app password.
  • Port number – Typically port 25, 465 (SSL) or 587 (TLS).
  • Backup SMTP – A secondary, alternate SMTP server that will be used if the primary is unavailable.

To find these details, consult your email provider’s help documentation, account settings, or customer support. Enabling additional security is always recommended for reliable, safe delivery of your emails.

Key Benefits of Knowing Your SMTP Server

There are a few key reasons why you’ll want to know your accurate SMTP server name and settings:

  • Allows proper email client configuration – Email software needs to know how to route your outgoing mail through the correct channels to recipients. Without this, your messages will fail to send from your device.
  • Enables use of alternate email programs – Using webmail through a browser is convenient. But setting up a desktop mail client allows offline access, better organization, more features. Identifying SMTP details facilitates client setup across various devices.
  • Can help troubleshoot email delivery issues – If your messages aren’t sending external recipients, confirming your SMTP name and parameters ensures your client can communicate with your outbound servers correctly.
  • Tightens email security – Applying extra encryption protocols like SSL bolsters security between your device, email provider, and recipient servers for private communication.

So in summary, knowing key details about your SMTP mail servers empowers external delivery while optimizing reliability and safety.

Key Takeaways on SMTP Server Names

  • An SMTP server handles the sending of outgoing email from your account. Incoming mail uses different protocols like IMAP or POP3.
  • Popular mailbox providers have their own SMTP servers identified by domain names like smtp.gmail.com or smtp.mail.yahoo.com.
  • SMTP configuration requires more than just a server name, including encryption method, login credentials, and ports for robust functionality.
  • Confirming your accurate SMTP name and parameters ensures reliable delivery of your email messages to recipients.
  • Enabling security features like SSL or TLS encryption is recommended to keep your mail traffic private between servers.


Your SMTP email server allows outgoing messages to be delivered from your devices to recipients’ inboxes. By identifying your SMTP server name and configuration details through your email provider, you empower reliable, secure communication through proper account setup and troubleshooting if issues arise. Following best practices for encryption and authentication keeps your mail safe on its journey. With this foundation, you can feel confident that your important emails will arrive intact to recipients worldwide.

Frequently Asked Questions

  1. What is the difference between SMTP, IMAP and POP3?
    SMTP handles sending outgoing mail. IMAP and POP3 handle receiving incoming mail and are not related to SMTP servers.
  2. How do I find SMTP server settings for my Verizon/Comcast/Charter email address?
    Check your ISP’s customer support website or contact their technical team for SMTP details on your account.
  3. Can I use Gmail’s SMTP server for a non-Gmail email account?
    No, you can only use Gmail’s SMTP with @gmail.com email addresses, not third-party ones.
  4. What SMTP server does Outlook 365 use?
    Outlook 365 uses Microsoft’s SMTP relay service smtp.office365.com for sending outbound mail.
  5. Why do I need to enable SSL/TLS encryption on SMTP?
    For better security and privacy between your device, email provider servers, and the recipient’s servers when transmitting your emails.
  6. How do I set up SMTP server settings in Microsoft Outlook?
    Go to File > Account Settings > Account Settings > Select your email account > More Settings > Outgoing Server tab. Enter your SMTP details here.
  7. Can I use the same SMTP server for multiple email accounts?
    No, you can only associate one set of SMTP server credentials per account. You cannot reuse them across different accounts.
  8. What port numbers do SMTP servers use?
    Typically port 25 for unencrypted connections, 465 for SSL connections or 587 for TLS connections.
  9. What could cause my SMTP server connection to be rejected?
    Incorrect encryption settings, blocked port numbers, invalid login credentials or authentication problems can cause rejected connections.
  10. Can I connect to SMTP over public Wi-Fi or is it unsafe?
    It depends on the encryption chosen – SSL and TLS connections are safe over public Wi-Fi. Unencrypted connections pose privacy and security risks.
  11. Is Telnet a valid way to test my SMTP server settings?
    Yes, you can use the Telnet command line tool to attempt an SMTP connection and debug issues if mail sending is failing.
  12. My emails send but end up in recipients’ spam folders. Why?
    This can happen if your SMTP IP address lacks proper SPF/DKIM records for anti-spam validation or has previously sent malicious mail.
  13. How do I choose backup or alternate SMTP servers?
    Choose reputable SMTP providers that align with your encryption methods. Double check their server names, ports and other details in their documentation.
  14. Can my SMTP server name change or be updated by my provider?
    Possibly yes, over time – check your email provider’s current documentation to confirm you have the latest supported SMTP name.
  15. What is the maximum email size I can send through SMTP?
    It depends on your email provider – Gmail allows up to 25MB per message. Enterprise servers may allow 50MB or higher depending on configuration.
  16. My emails failed sending and my SMTP logs show error code 500. What does this mean?
    500 errors indicate configuration issues like invalid commands, unrecognized recipients, or protocol mismatches between client and server sides.
  17. How often should I check that my SMTP settings are up-to-date?
    Review SMTP settings with each major email client update in case of changes needed. Also verify if sending issues start occurring suddenly.
  18. Is SMTP transfer encryption the same thing as email encryption?
    No, they serve different purposes. SMTP transfer encryption like SSL secures delivery between mail servers only. Email encryption protects message content end-to-end.
  19. Can I authenticate to SMTP servers without needing a password?
    Yes, SMTP authentication methods include trusted networks, integration with ActiveDirectory, client certificates, OAuth2 tokens or SSH keys for going passwordless.
  20. What open source SMTP servers are available if I want to host my own?
    Popular self-hosted servers include Postfix, Sendmail, Exim, and Qmail. These give you control instead of relying on third parties.

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