Free tools
Cold email tools, free and without a signup
Five things worth checking before you send a campaign. No account, no email address, no credit card — each one gives you the answer on the page.
SPF, DKIM & DMARC checker
Read your sending domain's public DNS records and find out whether authentication is set up correctly. Fails here mean spam regardless of what you wrote.
Checks live DNSOpenSpam & Promotions scorer
Score a draft for spam-trigger wording and, separately, for the structural signals that land mail in Gmail's Promotions tab. Two different failure modes.
Runs in your browserOpenWarmup ramp planner
Pick a starting volume, a daily increase and a target, and get the day-by-day schedule plus the date the mailbox reaches full volume.
Runs in your browserOpenEmail address checker
Check one address for a format mistake and for whether its domain can receive mail at all. Bounces are the fastest way to burn a sending domain.
20 a dayOpenOne-click unsubscribe checker
Paste a sent message's headers and see whether List-Unsubscribe and List-Unsubscribe-Post actually satisfy RFC 8058 and the Gmail and Yahoo bulk-sender rules.
Runs in your browserOpen
These tell you about risk. None of them tells you where your mail landed.
Passing DNS records, clean copy and a sensible ramp make you eligible for the inbox. The only way to know you reach it is to send a real email and read the folder it arrived in. Oxeyo does that through your own mailboxes and cuts a mailbox’s volume automatically when its inbox rate drops.
See how it works