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 ----------- 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%)