Free deliverability tools
No account needed. The same checks The Send Labs runs for its customers.
SPF, DKIM and DMARC checker
Check a domain's MX, SPF (with its lookup count), DKIM key size, DMARC policy, blocklists and age, and get the records to publish.
Blacklist checker
Look a domain up on Spamhaus DBL, URIBL and SURBL, or an IP on Spamhaus ZEN, Barracuda, SpamCop and more.
Spam words checker
Paste an email and see the phrases, links, images and formatting that spam filters dislike.
Free spam test
Send one email to our seed inboxes and see if it lands in the inbox or spam at Gmail, Outlook, Yahoo and others.