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Free Email Port Checker

Free

Analyze and verify with our free Email Port Checker. Get instant, accurate results to protect your domain and email reputation. 100% free.

Often Blocked
25
Standard SMTPSMTP
None / STARTTLS

The original standard email SMTP port. Mostly used for SMTP relaying between mail servers. Today, almost all consumer ISPs and cloud hosting providers block outbound traffic on port 25 to prevent spam.

Do not use for client submission. Only use for server-to-server relaying if your host permits it.
Recommended
587
Message SubmissionSMTP
STARTTLS

The standard port for SMTP message submission. It ensures that emails are submitted securely using TLS encryption (via the STARTTLS command) and requires proper authentication.

Highly recommended for all modern email clients sending mail to an SMTP server.
465
Secure SMTPSMTPS
Implicit SSL/TLS

Originally registered for SMTPS, then deprecated, and recently revived. It requires an implicit SSL/TLS connection before any SMTP commands are sent.

Use if your application requires implicit SSL/TLS instead of STARTTLS.
Recommended
993
Secure IMAPIMAPS
Implicit SSL/TLS

The standard port for receiving email securely via IMAP. It keeps your email client in sync with the server.

Highly recommended for reading emails.
143
Standard IMAPIMAP
None / STARTTLS

The default unencrypted port for IMAP. While it can be secured with STARTTLS, port 993 is generally preferred.

Avoid unless required by legacy systems.
995
Secure POP3POP3S
Implicit SSL/TLS

The secure port for POP3, which downloads emails to your local device and typically deletes them from the server.

Use if you strictly need POP3 instead of IMAP.
110
Standard POP3POP3
None / STARTTLS

The default unencrypted port for POP3.

Avoid unless required by legacy systems.

Frequently Asked Questions

What is the Email Port Checker tool?

This tool performs deep analysis and lookups to verify configurations, helping you ensure optimal deliverability and security.

Is the Email Port Checker completely free?

Yes! All utilities on freemailtools.com, including the Email Port Checker, are 100% free to use with absolutely no registration required.

Is my data secure when using this tool?

Absolutely. We process data securely and do not store sensitive email content or configurations permanently on our servers.

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