I'm pretty sure I've seen some negative scoring in for multiple Froms in
spamassassin both as multiple From: headers or just values.
I also think I saw it in Lyris Mailshield.
Multiple From: headers was(/is?) was relatively common in email spambots.
On 2021-12-13 12:19 p.m., Alessandro Vesely via mailop wrote:
Hi,
I assume everybody knows that RFC 5322 allows multiple mailboxes in the
From: field. This feature existed in RFC822 already. I think it is to
be used for those cases where multiple persons are authoring a message,
albeit adding the list of coauthors is usually not done. This message
is an example. How many rejects does it yield?
Gmail reacts like so:
Action: failed
Status: 5.0.0
Remote-MTA: dns; gmail-smtp-in.l.google.com [108.177.119.27]
Diagnostic-Code: smtp; 550-5.7.1 [192.0.2.4 13] Messages with
multiple addresses in From:
550 5.7.1 header are not accepted. do22si22787062ejc.211 - gsmtp
Is it customary to reject messages with multiple addresses in From:? Why?
Best
Ale
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