my parents aren´t able to send out mails from my mailcow.
They get blocked because their IP is blocked by spamhaus. ISP is Telekom.
Trying to get a new IP hasn´t resolved the problem.
Any suggestions on how to unblock it in mailcow?
NOQUEUE: reject: RCPT from [XXX.XXX.XXX.XXX]:58054: 550 5.7.1 Service unavailable; client [XXX.XXX.XXX.XXX] blocked using zen.spamhaus.org; firstname.lastname@example.org, email@example.com, proto=ESMTP, helo=<smtpclient.apple>