I have a few messages that have been incorrectly tagged because the sender
used their yahoo address as the sender, but used a mass mailer (
contactbeacon.com) to send their newsletter for them. Apparently this is
enough for it to hit FORGED_YAHOO_RCVD and L_UNVERIFIED_YAHOO, causing it
to be marked as spam.

Is there something I'm missing, or is there a better way to do this to
avoid the FPs in the future?

The problem probably has something to do with Yahoo! (and AOL) publishing strict DMARC records. So anything "From:" a @yahoo.com (or @aol.com) address that isnt' coming from a Yahoo! (or AOL) mail server is required to be blocked according to DMARC.

The mass mailer needs to change the "From:" address to be something @contactbeacon.com and use the "Reply-to:" for the email address they want replies to go to. Certainly anything sent "From:" a @yahoo.com address but from a contactbeacon.com server will be rejected by mail systems that implement DMARC checking, such as Yahoo!, AOL, and more.

Anthony
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