Powermail is a well-known, editor-friendly, powerful and easy to use mailform extension with a lots of features (spam prevention, marketing information, optin, ajax submit, diagram analysis, etc...)
!!! Minor update with some bugfixes. One fix is a small breaking change because the path to the JS files has to be changed. See https://docs.typo3.org/typo3cms/extensions/powermail/Changelog/Index.html for all details about this version.