47.1.2 Block port 25
The block of port 25 can prevent abuse/misuse by LAN machines. If the system is acting as the LAN network gateway,
the administrator can create a firewall rule inside the
Rules
page.
1
Rspamd – Fast, free and open-source spam filtering system.
https://rspamd.com/
3
Greylisting is a method of defending e-mail users against spam. A mail transfer agent (MTA) using greylisting will “temporarily reject” any
email from a sender it does not recognize –
Wikipedia
4
alterMIME is a small program which is used to alter your mime-encoded mailpack –
https://pldaniels.com/altermime/
201
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