Hi, Giovanni,
The problem is the domain you’re sending to is using an open resolver, not that
your sending IP is on spamhaus. That is explained in the link that was returned
in the message. You need to contact the recipients and tell them they need to
get their admins to fix it. At this point,
Hi,
yesterday some email have been blocked by SpamHaus and Yahoo (which might query
SpamHaus as well).
Error message are:
503-Rejected because 38.124.232.237 is in a black list at zen.spamhaus.org
503-Error: open resolver; https://www.spamhaus.org/returnc/pub/172.69.169.15
Checking the mentioned
