Free email address validator

The Verifalia add-on for Google Sheets allows users to easily verify email addresses in Google Sheets at just the click of a few buttons. Do you have a mailing list in Google Sheets and want to clean it up? Then this add-on will be for you.

DomainKeys Identified Mail is an email verification system used by email servers that ensures the receiving server knows the sender and their intended recipient. This allows for greater security between the recipient and the sender: let's find out how it works.

End-to-End encryption, also known as Asymmetric encryption or E2EE, is a means of encryption that ensures the privacy and security of any data that is being transferred between two ends: it disallows tampering or spying and can be proof of transferring and receiving some content.