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I run a couple of mailing lists that get pretty decent traffic. I used to use Exim as my MTA. I came across a pretty strage problem using Exim a couple of weeks ago. Mails to cyberspace.org started bouncing. I somehow managed to exchange a few emails with one of the admins of this service and they adviced me to move to a different MTA. I installed sendmail. Stragely, once I installed sendmail I noticed that any email to the vsnl.net.in domain started bouncing. One of the mailing lists I run is the Linux-india mailing list. Many people in the vsnl.net.in domain are subscribed to this list. I ran a couple of tests and the results are as following: OS: Debian 2.1 (hamm) sendmail: 8.9.3-3 exim: 2.05-1 * Sendmail acting as the MTA. Any mail to the vsnl.net.in domain is bouncing. www:~ $ echo "testing. Please ignore" | sendmail -v [EMAIL PROTECTED] Warning: alias database /etc/aliases.db out of date [EMAIL PROTECTED] Connecting to sbcsmtp1.ptss.com. via esmtp... 220 sbcsmtp1.ptss.com ESMTP Sendmail 8.8.8/8.8.8; Wed, 23 Jun 1999 10:29:03 -070 0 (PDT) >>> EHLO aunet.org 250-sbcsmtp1.ptss.com Hello aunet.org [216.103.113.202], pleased to meet you 250-8BITMIME 250-SIZE 16000000 250-DSN 250-ONEX 250-ETRN 250-XUSR 250 HELP >>> MAIL From:<[EMAIL PROTECTED]> SIZE=24 250 <[EMAIL PROTECTED]>... Sender ok >>> RCPT To:<[EMAIL PROTECTED]> 553 <[EMAIL PROTECTED]>... relay hosting BLOCKED [EMAIL PROTECTED] User unknown >>> RSET 250 Reset state /home/thaths/dead.letter... Saved message in /home/thaths/dead.letter Closing connection to sbcsmtp1.ptss.com. >>> QUIT 221 sbcsmtp1.ptss.com closing connection * Using Exim as MTA. Mails reach vsnl.net.in fine. Mails to cyberspace.org now bouncing. $ echo "Testing. Please ignore." | sendmail -v [EMAIL PROTECTED] LOG: 0 MAIN <= [EMAIL PROTECTED] U=thaths P=local S=292 www:~ $ Exim version 2.05 debug level 1 uid=8 gid=8 probably Berkeley DB version 1.8x (native mode) delivering message 10wrvg-0003mp-00 Connecting to blr.vsnl.net.in [202.54.12.6] ... connected SMTP<< 220 blr.vsnl.net.in ESMTP Sendmail 8.9.1a/8.9.1; Thu, 24 Jun 1999 00:06 :12 +0530 (IST) SMTP>> EHLO www SMTP<< 250-blr.vsnl.net.in Hello aunet.org [216.103.113.202], pleased to meet you 250-EXPN 250-VERB 250-8BITMIME 250-SIZE 250-DSN 250-ONEX 250-ETRN 250-XUSR 250 HELP SMTP>> MAIL FROM:<[EMAIL PROTECTED]> SIZE=1323 SMTP<< 250 <[EMAIL PROTECTED]>... Sender ok SMTP>> RCPT TO:<[EMAIL PROTECTED]> SMTP<< 250 <[EMAIL PROTECTED]>... Recipient ok SMTP>> DATA SMTP<< 354 Enter mail, end with "." on a line by itself SMTP>> writing message and terminating "." SMTP<< 250 AAA03580 Message accepted for delivery SMTP>> QUIT LOG: 0 MAIN => [EMAIL PROTECTED] R=lookuphost T=remote_smtp H=blr.vsnl.net.in [202.54.12 .6] LOG: 0 MAIN Completed $ echo "Testing. Please ignore." | sendmail -v [EMAIL PROTECTED] LOG: 0 MAIN <= [EMAIL PROTECTED] U=thaths P=local S=295 www:~ $ Exim version 2.05 debug level 1 uid=8 gid=8 probably Berkeley DB version 1.8x (native mode) delivering message 10wrwF-0003ms-00 Connecting to grex.cyberspace.org [204.212.46.130] ... connected SMTP<< 220-grex.cyberspace.org Sendmail 8.6.13/8.6.12 ready at Wed, 23 Jun 199 9 14:40:54 -0400 220 ESMTP spoken here SMTP>> EHLO www SMTP<< 250-grex.cyberspace.org Hello aunet.org [216.103.113.202], pleased to meet you 250-EXPN 250-SIZE 100000 250 HELP SMTP>> MAIL FROM:<[EMAIL PROTECTED]> SIZE=1326 SMTP<< 250 <[EMAIL PROTECTED]>... Sender ok SMTP>> RCPT TO:<[EMAIL PROTECTED]> SMTP<< 553 <[EMAIL PROTECTED]>... One generation passeth away, and another generation cometh: but the earth abideth for ever. SMTP>> QUIT LOG: 0 MAIN ** [EMAIL PROTECTED] R=lookuphost T=remote_smtp: SMTP error from remote m ailer after RCPT TO: <[EMAIL PROTECTED]>: host grex.cyberspace.org [204.212 .46.130]: 553 <[EMAIL PROTECTED]>... One generation passeth away, and anoth er generation cometh: but the earth abideth for ever. Exim version 2.05 debug level 1 uid=8 gid=8 probably Berkeley DB version 1.8x (native mode) LOG: 0 MAIN <= <> R=10wrwF-0003ms-00 U=mail P=local S=1228 LOG: 5 MAIN Error message sent to [EMAIL PROTECTED] LOG: 0 MAIN Completed Exim version 2.05 debug level 1 uid=8 gid=8 probably Berkeley DB version 1.8x (native mode) delivering message 10wrwH-0003mx-00 LOG: 0 MAIN => thaths <[EMAIL PROTECTED]> D=localuser T=local_delivery LOG: 0 MAIN Completed What gives? Would really appreciate help in fixing this under Exim. Thanks. Thaths -- "If there were any justice, my face would be on a bunch of crappy merchandise" -- Homer J. Simpson