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.
Jayson
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-boun...@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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