add asMailString() about env-var HOT 4 CLOSED

i think so, i'm not very familiar with regex and am typescript's noob, but i'll try anyway... carefully review my PR!

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Released this in version 7.2.0. Thank you all.

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@RodrigoDornelles this is a good suggestion. I've had to do this before, though I was lazy and used asString().

The one issue with this is how strict the implementation is. There are a few good suggestions in this StackOverflow post and this one too.

Personally I would accept a PR that does a simple regex, then mention this in the module docs. Aiming for full RFC compliance is not necessary since it would require using a third party module like this one or potentially complex code.

Do you want to open a PR?

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Hi guys,

Thank you for providing this simple and awesome library, I love this. :D

And I will be also happy if this feature will be implemented, but there seems to be no progress in months, so I opened a PR.

#158

I'm happy to be reviewed.

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