In comp.sys.raspberry-pi,
I R A Darth Aggie   wrote:
> You're already in a state of regex sin.

100% agree.

>                                                           The "+" is a
> sendmail construct, and has been replicated in postfix and possibly
> (likely?) present in other MTAs.

There's a little operator called "gmail" that supports it. I use it for
testing things that need a unique email address, eg signups to a web
site, by sticking a timestamp in: username+20200321132952@gmail.com.
The format is then easy for me to select on the backend and delete
things later.

I think the original use the + was the Andrew system at CMU back in late
1980s early 1990s. It was certainly quickly implemented in sendmail's
famously obfuscated cf language, but I don't know that CMU was using
sendmail to do that.

http://www.faqs.org/faqs/mail/addressing/

(But note: Last-modified: (2 Jun 98 14:32:39) )

Elijah
------
gmail wasn't around in 1998

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