Sendmail Sender Verification

[Ugo Bellavance]

> -----Message d'origine-----
> De : Mike Kercher [mailto:mike at CAMAROSS.NET] 
> Envoyé : 30 mars, 2004 08:11
> À : MAILSCANNER at JISCMAIL.AC.UK
> Objet : Re: Sendmail Sender Verification
> 
> 
> I am NOT an AOL member :)  These are all inbound 
> messages...usually to a
> non-existant account.

I don't see anything unusual here.  Probably a AOL user that has a virus that sends itself or sends spam.

> 
> Mike
>  
> 
> > -----Original Message-----
> > From: MailScanner mailing list 
> > [mailto:MAILSCANNER at JISCMAIL.AC.UK] On Behalf Of Ugo Bellavance
> > Sent: Tuesday, March 30, 2004 5:06 AM
> > To: MAILSCANNER at JISCMAIL.AC.UK
> > Subject: Re: Sendmail Sender Verification
> > 
> > >-----Message d'origine-----
> > >De : Mike Kercher [mailto:mike at CAMAROSS.NET] Envoyé : 30 
> mars, 2004 
> > >01:28 À : MAILSCANNER at JISCMAIL.AC.UK Objet : OT: Sendmail Sender 
> > >Verification
> > >
> > >
> > >I've been noticing more and more log entries from aol.com lately 
> > >similar to the following:
> > >
> > >Mar 29 22:18:24 avwall sendmail[29603]: i2U4INJU029603: 
> > >from=<>, size=3001,
> > >class=0, nrcpts=1, 
> msgid=<200403300421.XAG19946 at rly-xk01.mx.aol.com>,
> > >proto=ESMTP, daemon=MTA, relay=omr-m11.mx.aol.com 
> > [64.12.138.23] Mar 29 
> > >22:18:30 avwall sendmail[29620]: i2U4INJU029603:
> > >to=<username at somedomain.com>, delay=00:00:07, xdelay=00:00:00, 
> > >mailer=local, pri=123001, dsn=2.0.0, stat=Sent
> > >
> > >I assume that the omr- stands for Open Mail Relay or 
> > something of the 
> > >sort and I also assume that it is verifying that the email 
> > address is 
> > >deliverable prior to delivering an email from an address to 
> > the final 
> > >AOL recipient.  I suspect they are doing something like this 
> > to combat 
> > >their massive spam flow.
> > 
> > http://postmaster.aol.com/info/servers.html
> > 
> > OMR : outbound mail relay.
> > 
> > Are you an aol subscriber?
> > 
> > Was that an inbound or outbound message?
> > 
> > >
> > >Has anyone implemented anything like this with sendmail.  
> I know it 
> > >would introduce additional network traffic, but might it be 
> > worth the 
> > >trade-off?
> > >Thoughts?
> > >
> > >Mike
> > >
> > 
>