Free tools
Free email tools
Small tools for setting up a sending domain and working out what happened to a message. Each one runs in your browser, needs no account, and sends nothing you type anywhere.
SPF and DMARC record generator
Build the SPF and DMARC records for a new sending domain or subdomain, or check the ones you already publish, and see what each setting means.
Open the toolEmail header analyzer
Paste a message's headers to read its SPF, DKIM and DMARC results, whether the signature aligns with the From domain, the delivery path and how it threads.
Open the tool