Below are the steps to Validate a single or multiple Email Addresses at once.
Using SysTools Mac Email Address Checker
Download and Install the SysTools Email Address Checker tool for macOS. The primary interface of the software looks like the following:
After, uploading the .csv file. You need to click on Validate Emails or Clear button if you want to reupload.
Here, you can preview the emails validation via Syntax, Domain, MailServer, and Deliverable. Also, Click on Export to CSV button to view the output in CSV format.
Free Download Email Address Checker Tool for Mac Download Now