Bell Canada/Bellnexxia ignoring MX records, anybody else?

Thu Apr 17 16:17:31 UTC 2008

At 11:50 AM 4/17/2008, Mark Jeftovic wrote:
>At any rate, what it looks like to us is that customers using Bell 
>SMB outbound mail servers, possibly other outbound mail servers on 
>Bell (Nexxia, Sympatico?) to destination domains whose NS are hosted 
>on our nameservers seem to have the MX record *ignored* and the mail 
>is delivered to the A record for the domain.
>
>We also suspect that it happens when the MX record points at a host 
>back inside the Bell network/address space.

I had a quick look on our web server for the last 7 days (where the A 
record for sentex.net resides), and the only hosts contacting us 
there trying to send from @sympatico email are from Hotmail IP space 
(Bell I think outsources their resi email to MSN/Hotmail).  What IP 
addresses are involved in your case ? Send them to me and I can take 
a look to see if they are showing up. If you need more detail (SMTP 
IDs etc) let me know and I can send that offlist.

         ---Mike

# zgrep -i sympati maillog.[0-7].gz | grep relay= | awk -F"relay=" '{print $2}'
bay0-omc1-s26.bay0.hotmail.com [65.54.246.98]
bay0-omc2-s2.bay0.hotmail.com [65.54.246.138]
bay0-omc2-s23.bay0.hotmail.com [65.54.246.159]
bay0-omc1-s36.bay0.hotmail.com [65.54.246.108]
bay0-omc1-s6.bay0.hotmail.com [65.54.246.78]
bay0-omc1-s18.bay0.hotmail.com [65.54.246.90]
bay0-omc1-s22.bay0.hotmail.com [65.54.246.94]
bay0-omc1-s8.bay0.hotmail.com [65.54.246.80]
bay0-omc2-s40.bay0.hotmail.com [65.54.246.176]
bay0-omc2-s17.bay0.hotmail.com [65.54.246.153]
bay0-omc1-s8.bay0.hotmail.com [65.54.246.80]
bay0-omc3-s6.bay0.hotmail.com [65.54.246.206]
bay0-omc3-s16.bay0.hotmail.com [65.54.246.216]
bay0-omc1-s7.bay0.hotmail.com [65.54.246.79]
bay0-omc3-s1.bay0.hotmail.com [65.54.246.201]
bay0-omc1-s4.bay0.hotmail.com [65.54.246.76]
bay0-omc2-s13.bay0.hotmail.com [65.54.246.149]
bay0-omc1-s41.bay0.hotmail.com [65.54.246.113]
bay0-omc2-s39.bay0.hotmail.com [65.54.246.175]
bay0-omc3-s25.bay0.hotmail.com [65.54.246.225]
bay0-omc1-s15.bay0.hotmail.com [65.54.246.87]
bay0-omc2-s19.bay0.hotmail.com [65.54.246.155]
bay0-omc2-s14.bay0.hotmail.com [65.54.246.150]
bay0-omc2-s5.bay0.hotmail.com [65.54.246.141]
bay0-omc2-s38.bay0.hotmail.com [65.54.246.174]
bay0-omc3-s19.bay0.hotmail.com [65.54.246.219]
bay0-omc2-s9.bay0.hotmail.com [65.54.246.145]
bay0-omc1-s32.bay0.hotmail.com [65.54.246.104]
bay0-omc3-s12.bay0.hotmail.com [65.54.246.212]
bay0-omc2-s36.bay0.hotmail.com [65.54.246.172]
bay0-omc2-s40.bay0.hotmail.com [65.54.246.176]
bay0-omc1-s3.bay0.hotmail.com [65.54.246.75]
bay0-omc3-s31.bay0.hotmail.com [65.54.246.231]
bay0-omc3-s6.bay0.hotmail.com [65.54.246.206]
bay0-omc1-s29.bay0.hotmail.com [65.54.246.101]
bay0-omc2-s9.bay0.hotmail.com [65.54.246.145]
bay0-omc1-s34.bay0.hotmail.com [65.54.246.106]
bay0-omc3-s35.bay0.hotmail.com [65.54.246.235]
bay0-omc1-s21.bay0.hotmail.com [65.54.246.93]
bay0-omc1-s7.bay0.hotmail.com [65.54.246.79]
bay0-omc2-s7.bay0.hotmail.com [65.54.246.143]
bay0-omc1-s39.bay0.hotmail.com [65.54.246.111]
bay0-omc3-s38.bay0.hotmail.com [65.54.246.238]
bay0-omc3-s23.bay0.hotmail.com [65.54.246.223]
bay0-omc2-s1.bay0.hotmail.com [65.54.246.137]
bay0-omc2-s18.bay0.hotmail.com [65.54.246.154]
bay0-omc2-s38.bay0.hotmail.com [65.54.246.174]
bay0-omc1-s20.bay0.hotmail.com [65.54.246.92]
bay0-omc1-s11.bay0.hotmail.com [65.54.246.83]
bay0-omc3-s1.bay0.hotmail.com [65.54.246.201]
bay0-omc3-s21.bay0.hotmail.com [65.54.246.221]
bay0-omc2-s6.bay0.hotmail.com [65.54.246.142]
bay0-omc1-s13.bay0.hotmail.com [65.54.246.85]
bay0-omc2-s1.bay0.hotmail.com [65.54.246.137]
bay0-omc1-s25.bay0.hotmail.com [65.54.246.97]
bay0-omc2-s36.bay0.hotmail.com [65.54.246.172]
bay0-omc3-s7.bay0.hotmail.com [65.54.246.207]
bay0-omc3-s20.bay0.hotmail.com [65.54.246.220]
bay0-omc1-s35.bay0.hotmail.com [65.54.246.107]
bay0-omc2-s16.bay0.hotmail.com [65.54.246.152]
bay0-omc3-s40.bay0.hotmail.com [65.54.246.240]
bay0-omc3-s13.bay0.hotmail.com [65.54.246.213]
bay0-omc2-s6.bay0.hotmail.com [65.54.246.142]
s1.bay2.hotmail.com [65.54.246.99] (may be forged)
bay0-omc2-s5.bay0.hotmail.com [65.54.246.141]
bay0-omc1-s14.bay0.hotmail.com [65.54.246.86]
bay0-omc3-s22.bay0.hotmail.com [65.54.246.222]
bay0-omc1-s13.bay0.hotmail.com [65.54.246.85]
bay0-omc1-s17.bay0.hotmail.com [65.54.246.89]
bay0-omc2-s10.bay0.hotmail.com [65.54.246.146]
bay0-omc3-s3.bay0.hotmail.com [65.54.246.203]
bay0-omc3-s11.bay0.hotmail.com [65.54.246.211]
bay0-omc2-s26.bay0.hotmail.com [65.54.246.162]
bay0-omc3-s33.bay0.hotmail.com [65.54.246.233]
bay0-omc1-s40.bay0.hotmail.com [65.54.246.112]
bay0-omc1-s39.bay0.hotmail.com [65.54.246.111]
bay0-omc3-s15.bay0.hotmail.com [65.54.246.215]
bay0-omc2-s19.bay0.hotmail.com [65.54.246.155]
bay0-omc3-s38.bay0.hotmail.com [65.54.246.238]
bay0-omc2-s37.bay0.hotmail.com [65.54.246.173]
bay0-omc3-s24.bay0.hotmail.com [65.54.246.224]
bay0-omc1-s32.bay0.hotmail.com [65.54.246.104]
bay0-omc2-s33.bay0.hotmail.com [65.54.246.169]
bay0-omc1-s24.bay0.hotmail.com [65.54.246.96]
bay0-omc1-s2.bay0.hotmail.com [65.54.246.74]
bay0-omc2-s25.bay0.hotmail.com [65.54.246.161]
bay0-omc3-s35.bay0.hotmail.com [65.54.246.235]
bay0-omc2-s30.bay0.hotmail.com [65.54.246.166]
bay0-omc1-s6.bay0.hotmail.com [65.54.246.78]
bay0-omc3-s18.bay0.hotmail.com [65.54.246.218]
s1.bay2.hotmail.com [65.54.246.99] (may be forged)
bay0-omc2-s24.bay0.hotmail.com [65.54.246.160]
bay0-omc3-s16.bay0.hotmail.com [65.54.246.216]
bay0-omc2-s39.bay0.hotmail.com [65.54.246.175]
bay0-omc2-s1.bay0.hotmail.com [65.54.246.137]
bay0-omc2-s40.bay0.hotmail.com [65.54.246.176]
bay0-omc1-s17.bay0.hotmail.com [65.54.246.89]
bay0-omc3-s3.bay0.hotmail.com [65.54.246.203]
bay0-omc1-s30.bay0.hotmail.com [65.54.246.102]
bay0-omc3-s3.bay0.hotmail.com [65.54.246.203]
bay0-omc3-s9.bay0.hotmail.com [65.54.246.209]
bay0-omc2-s40.bay0.hotmail.com [65.54.246.176]
bay0-omc3-s36.bay0.hotmail.com [65.54.246.236]
bay0-omc2-s18.bay0.hotmail.com [65.54.246.154]
bay0-omc2-s29.bay0.hotmail.com [65.54.246.165]
bay0-omc2-s2.bay0.hotmail.com [65.54.246.138]
bay0-omc2-s16.bay0.hotmail.com [65.54.246.152]
bay0-omc1-s33.bay0.hotmail.com [65.54.246.105]
bay0-omc3-s19.bay0.hotmail.com [65.54.246.219]
bay0-omc2-s31.bay0.hotmail.com [65.54.246.167]
bay0-omc3-s23.bay0.hotmail.com [65.54.246.223]
bay0-omc2-s8.bay0.hotmail.com [65.54.246.144]
bay0-omc2-s1.bay0.hotmail.com [65.54.246.137]
bay0-omc3-s19.bay0.hotmail.com [65.54.246.219]
bay0-omc3-s39.bay0.hotmail.com [65.54.246.239]
bay0-omc3-s32.bay0.hotmail.com [65.54.246.232]
bay0-omc3-s33.bay0.hotmail.com [65.54.246.233]
bay0-omc1-s20.bay0.hotmail.com [65.54.246.92]