OSEC

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Null Sender

From: Aaron P. Martinez (mlproficuous.com)
Date: Sat Apr 10 2004 - 01:42:02 CDT


I'm just wondering if this person has their smtp server misconfigured as
i'm not sure why i got the error that i did. My postfix machine got the
following message:

Unexpected response from pearland.com[24.227.131.42].

Transcript of session follows.

 In: 220 Welcome to Pearland.com X1
 Out: EHLO workhorse.proficuous.com
 In: 250-Pearland.com says hello
 In: 250-SIZE 0
 In: 250-8BITMIME
 In: 250-DSN
 In: 250-ETRN
 In: 250-AUTH LOGIN
 In: 250-AUTH=LOGIN
 In: 250 EXPN
 Out: MAIL FROM:<> SIZE=5764
 In: 501 bogus mail from
 Out: RSET
 In: 250 ok its reset
 Out: QUIT
I saw in Jim Seymore's Anti-UCE paper that according to RFC1123 "An
empty revers path MUST be supported"

Thanks,

Aaron