SpamBlock.ca effectively blocks spam

Registrar Sign-up Page! Submit your Mail Server IP addresses below to be white-listed, and your domain registrants can also use the @spamblock.ca service.

Note: You enter your mail server IP addresses below. If you are a Tucows reseller, you do not need to obtain the Tucows/OpenSRS mail server IP address, as they are already white listed. If you are a reseller for another Registrar, then besides your own mail server IP addresses, you will need to obtain the mail server IP addresses of the actual Registrar as well, if their system will be sending out any legitimate domain related email. If you are an accredited CIRA or ICANN registrar, you need to provide all mail server IP addresses that legitimate email to domain registrant, will be sent from.


Contact Name:
Contact Email:
Contact Phone:
Registrar Company:
Mail Server IP 1:
Mail Server IP 2:
Mail Server IP 3:
Mail Server IP 4:
Mail Server IP 5:
Mail Server IP 6:
Mail Server IP 7:
Mail Server IP 8:
Mail Server IP 9:
Mail Server IP 10: