Sendmail Sender Verification

[Mike Kercher]

I am NOT an AOL member :)  These are all inbound messages...usually to a
non-existant account.

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
> >
>