![]() When using a sender reputation on a FortiMail unit, which actions can be taken against a source IP address generating spam or invalid E-mail messages? FortiMail Delays the email messages from that source IP address with a temporary failure. Most of the mail servers don’t allow them to be used as open relays. ![]() This post shows you how to test SMTP servers, verify SMTP authentication and StartTLS encrypted connections from the Linux and Windows … To use a mail server, you must prove to the mail server that you are authorized to send email. Actions Displays the action to take when SMTP sessions match the rule. If the SMTP client IP address is a private one, the FortiMail unit will query the FortiGuard Antispam service to determine if the first public IP address in the header is blocklisted. If you already know exactly what you want, you can force a particular test or lookup. The first one, 250-AUTH LOGIN PLAIN, is the modern RFC-compliant way for a mail server to announce what authentication methods it supports.
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