Checking if email is valid

[Simon Connah]

Hi,

I'm building a simple project using smtplib and have a question. I've been doing unit testing but I'm not sure how to check if an email message is valid. Using regex sounds like a bad idea to me and the other options I found required paying for third party services.

Could someone push me in the right direction please? I just want to find out if a string is a valid email address.

Thank you.

Simon.
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