It stands for Domain Name Server Block List and refers only to the mechanism by which the block list is published (the Domain Name Server system). The term DNSBL is used often in the email deliverability industry. ![]() Are domain blacklists the same as DNSBLs? Far more common for GMass users, however, is the issue of domain-based blocking, since with the standard G Suite setup, your emails are sent from Gmail’s IP addresses. In that case, Gmail routes your email through the external SMTP server, which makes the IP reputation of your SMTP server relevant. The one exception to this rule is if you’re sending from an alias From Address in Gmail and were required to input your own SMTP server credentials. Therefore GMass users almost never have to worry about an IP block. Instead, all email is sent from users’ Gmail accounts, meaning email originates from Gmail’s IP addresses. Given that GMass is an email marketing service used by over 80,000 people, we’ve seen our fair share of deliverability and spam issues. Because GMass works on top of Gmail and G Suite, we don’t maintain our own sending IP addresses. Tips and tricks, gleaned from my own research and experience, about each blacklist. ![]() How to determine if a domain is on a blacklist.The most popular public domain blacklists and lesser known, but equally important, private domain blacklists.Domain blacklists have been used to filter email for years, and in this comprehensive guide, I’ll cover:
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