Sender reputation
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.
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.
Also see: Bounce rate, Domain warmup
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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.
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- 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.
- Domain warmup — cold email glossary
Gradually increasing send volume on a new or dormant domain so mailbox providers build trust in it, rather than throttling or spam-folding it by default.
- 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.
- Hard bounce — cold email glossary
A permanent delivery failure: the mailbox does not exist, the domain does not accept mail, or the server has rejected the recipient for good. Hard bounces are the ones that wreck sender reputation.