is there any issue on mail8

some customers can not connect to mail8

Mail8 is working fine. Please provide us the error message in support ticket which your clients are getting.

[LEFT]is mail8 IP blacklisted?[/LEFT]
[LEFT] [/LEFT]
[LEFT] Network Tools: DNS,IP,Email [/LEFT]
[LEFT] [/LEFT]
[LEFT] [/LEFT]

Yes, this IP is blacklisted but this is not being used as outgoing IP on Mail8. We have already added an another IP on Mail8. So this is not the issue.