On Mon, Oct 05, 2009 at 01:59:24PM -0400, Bill Moran wrote:
> In response to Gary Kline <kl...@thought.org>:
> >
> > Hey Guys,
> >
> > Is there a way I can tell that an email address, say
> >
> > j...@foo.com
> >
> > is still valid without joe knowing that I am curious? --And,
> > yes, this isn't a FBSD-specific question... .
> >
> > thanks for any insights,
>
> Sure. Telnet to the service and start a SMTP transaction, but then abort it:
>
> $ telnet mail.potentialtech.com 25
> Trying 66.167.251.6...
> Connected to mail.potentialtech.com.
> Escape character is '^]'.
> 220 mail.potentialtech.com ESMTP If you spam me I will bounce you
> helo mail.potentialtech.com
> 250 mail.potentialtech.com
> mail from: <wmo...@potentialtech.com>
> 250 2.1.0 Ok
> rcpt to: <j...@potentialtech.com>
> 450 5.7.0 <j...@potentialtech.com>: Recipient address rejected: User unknown
> in local recipient table
> quit
> 221 2.0.0 Bye
> Connection closed by foreign host.
>
> If you don't get a rejection after the "rcpt to:" line, then you know the
> server will accept the mail and you can close the connection without
> completing the transaction.
>
> Note, that this is no guarantee. Some spam catching nonsense may accept
> the mail right up to end, then throw it away without delivering it.
telnet couldn't connect for unknown reason but thabks for the tip. I
usually just
write and say HI, Howzit hanging... or whatever. Anyway, the sendmail
-bv ploy
indicates that this person is still at the address i have. no big
deal; i was just
wondering.
thanks, people,
gary
>
> --
> Bill Moran
> http://www.potentialtech.com
> http://people.collaborativefusion.com/~wmoran/
--
Gary Kline kl...@thought.org http://www.thought.org Public Service Unix
http://jottings.thought.org http://transfinite.thought.org
The 5.67a release of Jottings: http://jottings.thought.org/index.php
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