Hi guys,
I have a new cpanel webhosting server I setup with currently just my own site's and now got one customer hosting with me.
The server is only about 1-2 weeks old and I have done all sorts of EXIM hardening like ratelimiting deferred/failed messages and setting sending limit to 100 per hour.
Now the problem I have is, this customer sent an email to around ~90 of his contacts, all same email just saying basically they have a new email address, I can see in my logs that these emails were going through perfectly fine, until he had about 5 bouncebacks as these old contacts must have moved providers etc.
Shortly after, the emails started getting blocked by Spamhaus as the IP is now on their CSS list, I ran a test at MXtoolbox and also see we are now on "Protected Sky" as well.
Not sure why we got on there so quickly, the server has barely sent any emails until this customer started doing this, all other emails have been sent by myself personally and none of which are spammy, just conversations to customers. And I'd say probably a maximum of 50 emails in the last week.
Is it because the IP is new, so now he sent out this mass mail, it's penalized us due to so many BS emails in such a short time?
If so, how can I prevent this happening again, and how do I get off these lists?
Maybe a better idea to get a third-party service to act as a SMTP smart host? any suggestions on this?
Thanks everyone
I have a new cpanel webhosting server I setup with currently just my own site's and now got one customer hosting with me.
The server is only about 1-2 weeks old and I have done all sorts of EXIM hardening like ratelimiting deferred/failed messages and setting sending limit to 100 per hour.
Now the problem I have is, this customer sent an email to around ~90 of his contacts, all same email just saying basically they have a new email address, I can see in my logs that these emails were going through perfectly fine, until he had about 5 bouncebacks as these old contacts must have moved providers etc.
Shortly after, the emails started getting blocked by Spamhaus as the IP is now on their CSS list, I ran a test at MXtoolbox and also see we are now on "Protected Sky" as well.
Not sure why we got on there so quickly, the server has barely sent any emails until this customer started doing this, all other emails have been sent by myself personally and none of which are spammy, just conversations to customers. And I'd say probably a maximum of 50 emails in the last week.
Is it because the IP is new, so now he sent out this mass mail, it's penalized us due to so many BS emails in such a short time?
If so, how can I prevent this happening again, and how do I get off these lists?
Maybe a better idea to get a third-party service to act as a SMTP smart host? any suggestions on this?
Thanks everyone