One of our servers can no longer send to Hotmail, Gmail and Yahoo and it came about at the same time.
If I check online databases of spam lists, the server doesn't appear in there. I've submitted the IP to Microsoft who say they Mitigated from their system but the problem still remains.
I've changed the C class IP of the mail send outs and the same thing. It doesn't even go into junk. If I look at the mail queue, Hotmail etc accept the message, it just doesn't appear in the users inbox.
The following are all set:
SPF record and RDNS.
The only thing that works is using PHP Mailer to use another server to send email.
Any advice, pulling my hair out!
If I check online databases of spam lists, the server doesn't appear in there. I've submitted the IP to Microsoft who say they Mitigated from their system but the problem still remains.
I've changed the C class IP of the mail send outs and the same thing. It doesn't even go into junk. If I look at the mail queue, Hotmail etc accept the message, it just doesn't appear in the users inbox.
The following are all set:
SPF record and RDNS.
The only thing that works is using PHP Mailer to use another server to send email.
Any advice, pulling my hair out!