Checking if email is valid

[Simon Connah]

> 

> On 2023-11-01, Chris Angelico rosuav at gmail.com wrote:
> 

> > On Thu, 2 Nov 2023 at 05:21, Simon Connah via Python-list
> > python-list at python.org wrote:
> > 

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

> > There is only one way to know that a string is a valid email address,
> > and that's to send an email to it.
> > 

> > What is your goal though? For example, if you're trying to autolink
> > email addresses in text, you don't really care whether it's valid,
> > only that it looks like an address.
> 

> 

> There's often value in even only partially-effective checks though.
> With an email address you can easily check to see if it has an "@",
> and if the stuff after the "@" is a syntactically valid domain name.
> You can also go a bit further and check to see if the domain has an
> MX record, and if it doesn't then it is extremely unlikely that the
> address is valid.
> --
> https://mail.python.org/mailman/listinfo/python-list

Apparently UTF-8 characters are allowed in email addresses now. That is going to lead to a whole new level of pain for determining if an email address is correct.

Simon.
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