My hosting seems to be permanently banned by Yahoo and today Comcast started 
bouncing them.

I worked on the yahoo problem for a week with tech support and they never 
seemed to make any progress.   Yesterday comcast.net <http://comcast.net/> 
started bouncing with an RBL notice.
I’m ready to move my mailing list but I’m not sure where to and I’m wondering 
how common this problem is and how to select a provider that is capable of 
keeping my mailing list of the RBL’s.

———  Relevant bounce message from comcast

Action: failed
Status: 4.0.0
Diagnostic-Code: X-Postfix; delivery temporarily suspended: host
   mx1.comcast.net <http://mx1.comcast.net/>[96.114.157.80] refused to talk to 
me: 554
   resimta-po-36v.sys.comcast.net <http://resimta-po-36v.sys.comcast.net/> 
resimta-po-36v.sys.comcast.net <http://resimta-po-36v.sys.comcast.net/>
   74.220.211.235 found on one or more DNSBLs, see
   http://postmaster.comcast.net/smtp-error-codes.php#BL001000 
<http://postmaster.comcast.net/smtp-error-codes.php#BL001000>
Return-Path: <virtualdojo-boun...@createabeautifulworld.org 
<mailto:virtualdojo-boun...@createabeautifulworld.org>>
Received: from gateway10.unifiedlayer.com <http://gateway10.unifiedlayer.com/> 
(gateway10.unifiedlayer.com <http://gateway10.unifiedlayer.com/> [69.89.24.105])
        by gateway13.unifiedlayer.com <http://gateway13.unifiedlayer.com/> 
(Postfix) with ESMTP id C59AC202059C3
        for <t...@comcast.net <mailto:tejab...@comcast.net>>; Fri,  4 Jun 2021 
10:58:12 -0500 (CDT)
Received: from cm4.websitewelcome.com <http://cm4.websitewelcome.com/> (unknown 
[108.167.139.16])
        by gateway10.unifiedlayer.com <http://gateway10.unifiedlayer.com/> 
(Postfix) with ESMTP id D01C02009A768
        for <t...@comcast.net <mailto:tejab...@comcast.net>>; Fri,  4 Jun 2021 
10:58:10 -0500 (CDT)
Received: from shared18.arvixe.com <http://shared18.arvixe.com/> 
([143.95.240.20])
        by cmsmtp with ESMTP
        id pCD4ln04ID5lxpCD4lHJKQ; Fri, 04 Jun 2021 10:58:10 -0500
X-Authority-Reason: ss=1
Received: from [127.0.0.1] (port=22440 helo=shared18.arvixe.com 
<http://shared18.arvixe.com/>)
        by shared18.arvixe.com <http://shared18.arvixe.com/> with esmtp (Exim 
4.93)
        (envelope-from <virtualdojo-boun...@createabeautifulworld.org 
<mailto:virtualdojo-boun...@createabeautifulworld.org>>)
        id 1lpCD4-000rIO-Aw; Fri, 04 Jun 2021 10:58:10 -0500


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