From: Victor Duchovni (Victor.DuchovniMorganStanley.com)
Date: Fri Jun 29 2007 - 12:25:53 CDT

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On Fri, Jun 29, 2007 at 04:30:28PM +0000, Duane Hill wrote:

> >Can someone share with me why this email address:
> >
> > Yes!It'sDollarBlvdsprimgntiononly.com
> >
> >is valid? I didn't think the exclamation and single quote were allowed.
> >This has been causing some grief in my attempts to populate some info into
> >a MySQL table.
>
> Sorry. I didn't explain in more detail. Why is the email address above
> valid as the mail from:
>
> [d.hillduane ~]$ telnet 127.0.0.1 25
> Trying 127.0.0.1...
> Connected to smtpgate.example.com.
> Escape character is '^]'.
> 220 smtpgate.example.com NO UCE ESMTP
> helo sprimgntiononly.com
> 250 smtpgate.example.com
> mail from: <Yes!It'sDollarBlvdsprimgntiononly.com>
> 250 2.1.0 Ok

The punctuation characters <!> and <'> are valid in email addresses,
both in message headers and in the envelope sender address.

--
        Viktor.

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