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DKIM Checker

Enter your domain and the selector from your mail provider. Don't know the selector? Leave it empty and we try 40+ common ones (Google, Microsoft 365, Mailchimp and others).

Find the selector in any email from you: open the message source and look for s= in the DKIM-Signature header, or paste the headers into the Email Header Analyzer.

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Email Health MX, SPF, DMARC, DKIM, SMTP, blocklists and MTA-STS in one check. Blocklist Check Is your IP or domain on Spamhaus, SpamCop, Barracuda or 9 other blocklists? Email Header Analyzer Trace a message: every hop and delay, plus SPF, DKIM and DMARC results. SPF Generator Build a valid SPF TXT record for your mail senders.
Lanetti email Business email that lands in the inbox SPF, DKIM and DMARC set up for you, spam filtering in and out, webmail on your own domain. Hosted in Helsinki. See email hosting