Blacklist

The blacklist (or suppression list) is the set of addresses that should never receive your email — people who unsubscribed, hard-bounced, or complained. EmailFlow AI maintains it automatically so you stay compliant and protect your sender reputation.

What gets suppressed

Unsubscribes — anyone who opts out is suppressed immediately and permanently.
Hard bounces — addresses that don't exist or can't receive mail.
Spam complaints — recipients who marked your mail as spam.

Once an address is on the list, it's automatically excluded from every campaign and automation — you don't have to remember to remove it.

Why suppression matters

Continuing to email people who opted out is both a deliverability problem and a legal one. Anti-spam laws require honoring unsubscribes promptly, and mailbox providers treat repeat sends to complainers or dead addresses as strong negative signals. Reliable suppression keeps you compliant and keeps your reputation intact.

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Suppression is automatic and global across your account — an unsubscribe or complaint on one campaign protects every future send, with no manual cleanup.

Working with deliverability tools

The blacklist is one layer of a larger system. Automatic verification stops bad addresses from entering your sends in the first place, bounce and complaint handling feed the suppression list, and your reports surface the trends. Together they keep your lists clean without ongoing effort.

Best practices

Respect the signals the list represents: make unsubscribing easy, send relevant email to engaged segments, and never try to re-add a suppressed contact. Clean sending habits, combined with EmailFlow AI's automatic suppression, are the foundation of long-term inbox placement.

Frequently asked questions

How does an address end up suppressed? Automatically — when someone unsubscribes, hard-bounces, or marks an email as spam, we add them to your suppression list so they're excluded from future sends. You can also add addresses yourself.

Does suppression protect me? Yes. Continuing to email people who bounced or complained is one of the fastest ways to damage deliverability. Automatic suppression keeps those addresses out of your sends and your reputation intact.

Can I remove someone from the list? You can manage entries, but re-adding a previously unsubscribed contact requires their renewed consent — never re-subscribe people who opted out.