Thread: Sieve Rule weirdness
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Old 3 Sep 2019, 10:30 PM   #20
hbs
Junior Member
 
Join Date: Jul 2016
Posts: 23
Quote:
Can't help with the why, but FM needs the double backslashes.
I got curious myself and found it. The double-backslash is actually defined in RFC 5228, section 2.4.2.

So, Fastmail aren't the ones to blame.
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