Hello,
Got in touch with somebody from OpenExchange on a separate channel. I
got confirmation this issue has been fixed roughly two hours after your
e-mail on mailop, before I got a chance to get in touch with them.
The OpenExchange guys send their thanks and regards.
Cheers!
On 10/13/21 5:32 AM, Michael Peddemors via mailop wrote:
Seems someone/something got caught with not using a SpamHaus RBL
correctly..
Remote host 87.191.57.186 does not like recipient
<redaccted>@open-xchange.com
Remote host said: 554 5.7.1 Service unavailable; Client host [redactted]
blocked using sbl-xbl.spamhaus.org; Error: open resolver;
https://www.spamhaus.org/returnc/pub/74.63.24.238
https://www.spamhaus.org/news/article/807/using-our-public-mirrors-check-your-return-codes-now
host 87.191.57.186
Host 186.57.191.87.in-addr.arpa. not found: 3(NXDOMAIN)
The IP is a woodynet IP, maybe DNS problems?
But something in the way (anti-spam plugin?) is querying the RBL, isn't
using explicit return code checking..
No need to respond by email, just let them know if they haven't figured
it out already.
_______________________________________________
mailop mailing list
[email protected]
https://list.mailop.org/listinfo/mailop
