Blocking SMTP connections with MAIL FROM: <>
Question asked by Webio - 1/7/2017 at 10:21 AM
Unanswered
Hello,
 
I'm wondering if in current state of SmarterMail 15.x (latest) allows blocking incoming SMTP connections where incoming message contains empty from field:
 
MAIL FROM: <>
There is a place IMHO for this (Advanced Settings -> SMTP Blocking) where I can create new rule of type "Email address" but field "Blocked address" must be not empty so in my case it will not work.
 
Thanks
kevind Replied
Webio, are you getting an influx of spam from senders using MAIL FROM: <> ?
 
If so, it's because SmarterMail bypasses many spam checks including greylisting and PTR lookup when receiving messages from MAIL FROM: <>.  See this for more details: https://portal.smartertools.com/community/a87411/message-with-no-ptr-makes-it-through.aspx
 
I think this behavior should be changed as it gives spammers an open door. Maybe update this thread from a Question to a Problem so it can get fixed?
 
Kevin

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