Free tools
Three tools for the problems small businesses hit most with domains and email. No account, nothing to sign up for, and nothing you type is kept.
Domain health check
Type your domain and see when it expires, whether the website loads securely, and whether your email records are set up to keep your mail out of spam.
Bounce message explainer
Paste an "undeliverable" email and find out what went wrong, whose problem it is, and what to do next.
SPF record merger
Two SPF records break your email. Paste them, or look up your domain, and get the one correct record to publish.