Milter-greylist

Hi,


I'm using Milter-Greylist mainly to filter spam received by the 
submissions Email address for an online magazine, which by definition 
must be public. This magazine is for writers with disabilities including 
blindness, so tricks like putting the address in a picture won't work. 
Anyway, I awoke this morning to the disturbing news that a regular 
contributor was getting bounces when she tried to submit. I asked her to 
forward a bounce, and it looks like Comcast, her ISP, is treating my 
tempfail as a permfail and bouncing the message when it should be 
retrying. My question is, am I doing something wrong or is Comcast 
broken? Should my racl greylist line be a dacl instead? Below is the 
greylist line in question, followed by the delivery status report.


Thanks for any help,


Jayson


--------------------


racl greylist list "grey users" delay 30m autowhite 3d msg "All mail to 
this address is greylisted for spam prevention. Please try again later."

Reporting-MTA: dns; resqmta-ch2-03v.sys.comcast.net [69.252.207.35]
Received-From-MTA: dns; resomta-ch2-08v.sys.comcast.net [69.252.207.104]
Arrival-Date: Wed, 13 Feb 2019 20:08:17 +0000


Final-recipient: rfc822; submissions@...
Diagnostic-Code: smtp; 451 4.7.1 All mail to this address is greylisted 
for spam prevention. Please try again later.

Last-attempt-Date: Wed, 13 Feb 2019 20:08:18 +0000