In 2012, Gmail overtook Hotmail to become the world’s largest free email service. If Gmail rejects your email, you’ve had problems, whether you’re writing to a friend, contacting someone on a business trip, or sending a bulk email to a customer. It’s pretty simple to know if you’re blacklisted, but getting rid of it can take some work.
Get a message
If Google blacklists you, the email servers in your network will let you know. Gmail responds to blacklisted addresses by sending them to the 421 error server or error 550. 421 for temporary incidents; 550 indicates a complete block on the message originating from your Internet address. You may need to contact your email provider to research the servers. You can also enter your domain name on a website such as the MX Toolbox and see if the site reports a blacklist.
But you’re not a mailer
Gmail’s blacklist exists to remove spammers from Gmail accounts. If you send a batch of emails to your Gmail address, Gmail may decide you look like a mailer. That can happen even if it’s a business newsletter and everyone who receives it chooses to participate. That can also happen if someone hacks your account and sends spam to people using your address. Of course, if you or your company actually send spam, then you won’t be surprised at how Gmail reacts.
Take off list
To exit the blacklist, visit Google support and fill out a form to report delivery issues. Google will want to know the affected domain, the number of users, Gmail users you’re trying to reach, and the title for the affected emails. Google made no commitment on how long it would take to blacklist a legitimate email. If you don’t want to fill in much of that detail, there are IT consultants who will handle it for you.
Once you’re off the blacklist, take steps to avoid it. If your email account is hacked to become a spam creator, assign it a harder password and keep it safe. If you’re sending legitimate bulk mail that isn’t spam, sign up with Google using the bulk sender form. You can also work through a mass mail system like MailChimp.