BLOCK · disposable
postbx.ru
Yes — postbx.ru is a disposable email domain. It’s entry #3,775 of 5,440 in TrueUser’s tracked list.
What is postbx.ru?
If you saw postbx.ru in your signup logs, that's a disposable email. The domain belongs to a temporary-mail service: inboxes are generated on demand, content is short-lived or world-readable, and the cost of creating one is effectively zero.
Why block it?
- →Deliverability — bounces and spam complaints from throwaway domains damage your sender reputation across all of your mail.
- →Free-tier abuse — the same person can spin up a fresh @disposable address for each new trial, multiplying your acquisition cost without producing revenue.
- →Account quality — accounts created on disposable email rarely come back; they inflate vanity metrics while skewing every product decision built on them.
Block postbx.ru with one API call
POST the address to TrueUser’s verify endpoint. The response includes a verdict and the underlying signals so you can decide whether to block, hold for review, or accept.
# request
curl -X POST https://trueuser.dev/api/v1/verify \
-H "Authorization: Bearer $TRUEUSER_KEY" \
-H "Content-Type: application/json" \
-d '{"email":"[email protected]"}'
# response
{
"email": "[email protected]",
"verdict": "block",
"signals": { "disposable": true }
}
Related disposable domains
Neighbours of postbx.ru in the P bucket.