Fill an inbox on demand.
MailJunkies subscribes an inbox you control to hundreds of real mailing lists, generating a steady, diverse stream of live mail — the volume you need to train, tune and stress-test anti-spam filters and deliverability rules.
Collect sources
Drag the bookmarklet to your bar. Click it on any newsletter or signup page to register its form as a source — one click, no coding.
Start a campaign
Enter a target address you own, pick how many subscriptions and how fast. Watch progress fill in real time.
Train your filters
Real marketing mail lands in the mailbox. Feed it to your classifier, measure catch rates, and tune rules against genuine traffic.
Used responsibly
Every send is throttled and logged, and any address can be permanently excluded via the opt-out list. Only target inboxes you own or are explicitly authorized to fill.