Blacklist
A list of IPs or domains that some receivers treat as hostile. Being listed is a symptom of reputation problems, not the cause. Check it; then fix the bounces and complaints that put you there.
A list of IPs or domains that some receivers treat as hostile. Being listed is a symptom of reputation problems, not the cause. Check it; then fix the bounces and complaints that put you there.
Also see: Sender reputation, Spam trap
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A list of IPs or domains that some receivers treat as hostile. Being listed is a symptom of reputation problems, not the cause. Check it; then fix the bounces and complaints that put you there.
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- Sender reputation — cold email glossary
A mailbox provider's ongoing assessment of a sending domain, built from bounce rate, spam complaints, and engagement over time. Low reputation means spam-folding by default, regardless of content.
- Spam trap — cold email glossary
An email address, often previously real but now abandoned, used specifically to catch senders with poor list hygiene. Hitting one signals to providers that your list was not properly maintained.
- Cold email & deliverability glossary
Plain-language definitions for the terms that come up in cold outreach and email deliverability: bounce rate, catch-all, SPF/DKIM/DMARC, sender reputation, and more.
- Bounce rate — cold email glossary
The share of sent emails a mail server refuses to deliver. A hard bounce means the mailbox does not exist; a soft bounce means it is temporarily unreachable.