This is IP server from ovh.com marked as blacklisted on your systems !
False, all tools said there no problems and this IP deals millions of emails adresses.
https://mxtoolbox.com/SuperTool.aspx?ac ... n=toolpage
Code: Select all
"Checking 79.137.123.219 against 95 known blacklists...
Listed 0 times with 3 timeouts"
"This is the mail system at host mo803.mail-out.ovh.net.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
<**@*****>: host red.asikatec-server.de[85.14.240.140] said: 550
5.7.0 Server IP 79.137.123.219 listed as abusive. See
http://spamauditor.org/best-practices/ip-reputation/ for more information.
Protection provided by MagicSpam 2.0.18-1 http://www.magicspam.com (in
reply to RCPT TO command)
"