How can I avoid hitting spam traps?
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Spam traps are email addresses that exist solely to catch bad senders. Some are "pristine" traps that never belonged to a real person. Others are "recycled" addresses that used to be real, got abandoned, and were reactivated as traps. Mailbox providers and blocklist operators run them, and hitting enough of them quietly ruins your sender reputation.
Good news: almost every trap hit comes from the same three habits. Fix those and you're fine.
1. Never buy or rent a list
This is the single biggest source of trap hits. Purchased lists are full of abandoned addresses, scraped data, and pristine traps seeded to catch exactly this. If someone's selling you "50,000 opted-in CFO emails," they're selling you a reputation fire.
2. Require real permission at signup
Use double opt-in wherever you can. Someone types captain@deepcurrent.io into your form, you email them a confirmation link, they click. Now you know two things: the address works and a human is behind it. Traps don't click confirmation links.
If double opt-in isn't an option, at minimum validate addresses at signup. Reject typos (gnail.com, yaho.com), reject disposable domains, and catch junk submissions before they enter your list. Our list validation is built for exactly this cleanup (hi ;)).
3. Retire inactive subscribers on a schedule
Recycled traps come from addresses that stopped being used. If someone hasn't opened or clicked in 6 to 12 months, they're either gone, ignoring you, or becoming a trap. Move them out of your main send list. Run a short re-engagement series. If they don't respond, suppress them.
Now a good rhythm: quarterly review, flag non-openers past your window, move them to a re-engagement flow, then suppress the ones who still don't bite.
4. Audit before a big send
If you haven't mailed your list in a few months, don't just blast it. Validate first to catch addresses that went cold. Sending to a stale list is the most common way small senders land on a blocklist overnight.
If you've already hit traps and you're seeing blocklist entries or sudden deliverability drops, check your domain with our blocklist checker. If something's actively broken, the SOS hotline is free (and we actually pick up).
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