On 3 Jan 2026, at 7:58, [email protected] wrote:
Some Servers mark spam according your Junk history, BTW. The supposed
purpose is to reject at the server level, in the background before
downloading at all. Many users afraid of not seeing false rejection
don’t allow this server interaction (by default) so the server
appendage is made. Some servers have this “feature” editable.
As an another specific example I found, Apple (iCloud, mac, me.com)
instead marks it as suspicious in metadata, not subject line, but
passes it to their client Apple Mail which allows you to see it en
situ:(Spam or Junk folder).
A server that modifies the "Subject" header field is non-compliant, in
my opinion as someone who participated in writing the email
specifications. It's also very bad form, as it causes thread breakage,
and replies will show the spam indicator, which is rude.
Servers are free to add many header fields but are not supposed to
modify key fields. Servers can add a spam-score header field, for
example.
--Randall
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