Thu, 20 Jan 1994 09:58:50 CST
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Some of you running IBM's TCP/IP for VM (maybe MVS too - I'm not sure)
may find mail looping today. ACS.SAULTC.ON.CA is resolving to an MX
handler with the address 255.255.255.255. This gets short-circuited in
SMTP and the mail is "sent to itself". The only solution I've found is to
get onto SMTP and either remove the ADDRBLOK/NOTE or change the address to
something else.
If you are logging SMTP it is pretty easy to find this - just check the
incoming SMTP LOG for a send/receipt pair that keeps repeating. The mail NOTE
also tends to grow within SMTP with a new Received line every iteration.
I suppose while loop checking is avoided the max size might eventually
stop it but we have ours set quite high so I usually notice when SMTP
CPU use is higher than normal.
I decided to send this to both LISTSERV and SMTP lists because we removed
several subscribers from *@ACS.SAULTC.ON.CA as well as notifying the contacts
there of the problem. Will this be fixed in a future release of SMTP or
does anyone know of a fix now? The only IBMLink hit I got on SMTP and
255.255.255.255 was Charles Hedrick's Intro paper in the Q/A section.
Marty
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Marty Hoag [log in to unmask] US Mail: NDSU ITS
ND Higher Education Computer Network IACC Room 206
Phone: (701)-237-8639 Fax: (701)-237-8541 PO Box 5164
Bitnet: nu021172@NDSUVM1 (note 0=zero) Fargo, ND 58105
Records from each zone server:
=== QNS acs.saultc.on.ca 192.197.90.1 === 20 Jan 1994 10:08:54 ===
--- Query Name: ACS.SAULTC.ON.CA Qtype: MX ---
Server 1/1: 192.197.90.1 192.197.90.1 ACS.SAULTC.ON.CA
Question:
1 ACS.SAULTC.ON.CA MX IN
Answer(s): (ie. Primary Results of the Query)
1 ACS.SAULTC.ON.CA MX IN 86400 0,acs.saultc.on.ca
Additional: (ie. A records for others)
1 acs.saultc.on.ca A IN 86400 255.255.255.255
Elapsed time 3.88 sec.
--- Query Name: ACS.SAULTC.ON.CA Qtype: A ---
Server 1/1: 192.197.90.1 192.197.90.1
Question:
1 ACS.SAULTC.ON.CA A IN
Answer(s): (ie. Primary Results of the Query)
1 ACS.SAULTC.ON.CA A IN 86400 255.255.255.255
Elapsed time 5.39 sec.
End of queries. 1.0 of 1 successful (100%)
=== QNS acs.saultc.on.ca 128.100.102.112 === 20 Jan 1994 10:09:22 ===
--- Query Name: ACS.SAULTC.ON.CA Qtype: MX ---
Server 1/1: 128.100.102.112 128.100.102.112 ONET.ON.CA
Question:
1 ACS.SAULTC.ON.CA MX IN
Answer(s): (ie. Primary Results of the Query)
1 ACS.SAULTC.ON.CA MX IN 86400 0,acs.saultc.on.ca
Additional: (ie. A records for others)
1 acs.saultc.on.ca A IN 86400 255.255.255.255
Elapsed time 5.31 sec.
--- Query Name: ACS.SAULTC.ON.CA Qtype: A ---
Server 1/1: 128.100.102.112 128.100.102.112
Question:
1 ACS.SAULTC.ON.CA A IN
Answer(s): (ie. Primary Results of the Query)
1 ACS.SAULTC.ON.CA A IN 86400 255.255.255.255
Elapsed time 14.85 sec.
End of queries. 1.0 of 1 successful (100%)
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