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IT Atlas

Protocol

SMTP Submission

Authenticated client mail submission

Port 587TCPEncrypted: Yes

Record

Ports
587
Transport
TCP
Encryption
Yes
Typical use
Applications and devices sending mail

Security considerations

Basic auth submission accounts bypass MFA; prefer modern auth or restricted connectors

Where this protocol is explained

Email Security

Protecting the most used attack channel with authentication, filtering, link and attachment analysis, and user reporting.

Topics that use this protocol

Email Security

Protecting the most used attack channel with authentication, filtering, link and attachment analysis, and user reporting.

Other protocols over TCP

DNS over TLSFTPFTPSGlobal CatalogHTTPIMAP / IMAPSKubernetes APILDAPSMicrosoft SQL ServerMySQL / MariaDB

In the knowledge graph

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Explore SMTP Submission in the knowledge graph