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Re: [newtech-1] Faking the From Address (was: shakira photo gallery, etc.)

From: Hank W.
Sent on: Wednesday, October 24, 2007 2:03 PM

Good work man! This will be helpful to all of us.


On 10/24/07, whitneymcn <[address removed]> wrote:
> Yeah, it'll be interesting to see what Meetup does...though as I note
> below I think that we might not need them to do anything at all. :)
> Based on the message that you received it looks like Meetup *does* do
> SPF checks on incoming mail to the list:  because the spammer's message
> spoofing your email address failed the check for, the message
> wasn't delivered to the list.  This is an official Good Thing.
> My earlier message got through because it turns out that I've been a
> lameass slacker and forgot to set up an SPF record for
> without a published statement regarding what servers are allowed to send
> for the domain, Meetup apparently errs on the side of generosity and
> allows all messages through. [Can someone from Meetup confirm that I'm
> correct in this analysis, by the way?]
> The same applies to Dean -- not the "lameass slacker" part, of course,
> but the part about his domain  not having an SPF record set up.  No SPF
> record, no way for Meetup to determine whether a given email is actually
> coming from you.
> So here's my suggestion:  if you're using one of the big email providers
> (gmail, yahoo, what-have-you) you don't need to do anything at all.  If
> you're sending your mail from your own domain or a corporate domain, on
> the other hand, see about getting an SPF record set up if you don't
> already have one.  It's not hard:  Google "create SPF record" if this is
> a new area for you, and (within reason) I'm happy to offer advice or
> assistance for anyone who needs it.
> Seems like this is a problem that we can (largely) address ourselves, no
> Meetup intervention required.  I'll have my SPF record in place by this
> evening. :)
> Thanks,
> Whit
> **
> W.B. McNamara
> [address removed]
> 646-NEptune7-7791
> Ilya Z wrote:
> > Yea - that's the reality of email. Curious how will meetup address this?
> >
> > For the past 30 minutes all my emails (even [address removed]
> > <mailto:[address removed]>) were getting rejected. Seems they took
> > their email servers down (due to spam issue?)
> >
> > All emails bounced with:
> > Technical details of permanent failure:
> > PERM_FAILURE: SMTP Error (state 13):[masked]
> > <­[[masked] <http://209.85.146...;­:
> > Client host rejected: Access denied
> --
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> This message was sent by whitneymcn ([address removed]) from NY Tech Meetup.
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