Issue has been resolved. the IP range has been removed from the black list
*** UPDATE 18 Jan 2017 ***
It seems that Spamhaus has difficulties removing our IP range from the blacklist. Therfore we created a temporary mail relay server in another IP range which you can use.
NOTE: The mail relay server can only be used for LEGITIMATE mail. Spammers will be blocked. You can only use the mail relay server when your VPS is in the 220.127.116.11 - 18.104.22.168 range.
See http://serverfault.com/questions/776150/how-to-set-up-an-smtp-relay-server for how to configure the mail relay server in Linux.
Or just Google on "smtp relay windows" or "smtp relay linux"
Mail relay server IP: x.x.x.24 ***IP removed*** (As we're not blacklisted the mail relay server is not necessary anymore)
** UPDATE 16 Jan 2017 ***
The range below is still blacklisted. Spamhaus is very slow by removing the IP range from the blacklist. We recommend you to ask to recipient to disable Spamhaus spam filtering or receive on Gmail.
It seems that one of our IP ranges (from 22.214.171.124 to 126.96.36.199) has been blacklisted by Spamhaus.
This means that if you run a mail server in that range, mails might not arrive at the destination.
We requested Spamhaus to remove the IP range from the blacklist. We expect to be removed on 14 January before 23:59.
We are sorry for the inconvenience.
If you have any questions then please contact [email protected]
Saturday, January 14, 2017