mentorolz.blogg.se - Gfi mailessentials smtp relay

Verifies that the domain of the sender ’s SMTP email address (Note: It does not check the MIME FROM email address) is listed in the local domains list.The Anti-Spoofing filter performs the following steps sequentially: The sender claims to be from a local account but his SMTP connection is not authenticated.The same Email Domain is spread through mail servers physically situated in different locations and communicating outside the LAN.Email is relayed through multiple Mail Servers internally, which communicate through SMTP between them.Email is sent from an Email Client other than Microsoft Outlook and sends internal emails through unauthenticated SMTP rather than MAPI.Email is sent from a mobile device having its SMTP connection NOT authenticated.

The email is an auto-generated notification and is sent from a server, network device, or third-party software.

When internal emails (those sent from and to the same domain) are blocked, one of the below is true: MailEssentials recognizes internal emails as inbound when it is not installed on the Exchange server or when the same Email Domain is spread through mail servers physically situated in different locations such as in hybrid setups having Exchange on-premise and Exchange Online (O365) using the same domain.

Note that the Anti-Spam module is designed to only listen to and scan Inbound SMTP traffic. This article addresses the issue of internal emails getting flagged as inbound and blocked by the Anti-Spoofing spam filter.