[Mailman-Users] Sending domain does not exist but it actually does?

Jayson Smith jaybird at bluegrasspals.com
Thu Mar 22 14:14:05 EDT 2018

FYI the host in question is bluegrasspals.com. It does have an A record, 
and its ip has proper reverse nslookup back to the domain. My host 
supports IPV6 but I'm not using it for mail.


On 3/22/2018 1:41 PM, Mark Sapiro wrote:
> On 03/22/2018 07:10 AM, Jayson Smith wrote:
>> <<< 550 #5.1.8 Domain of sender address <xxxxxxx-bounces at xxxxxxx.com>
>> does not exist
>> 554 5.0.0 Service unavailable
> I would check the following in DNS
> Does xxxxxxx.com have an A record (not a CNAME)?
> Does the IP address in that A record have a PTR (rDNS) back to xxxxxxx.com?
> If you support IPv6, check the same things for the AAAA record.

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