[exim] dupes on a mailing list

psg.com:/usr/local/majordomo# exim -bV
Exim version 4.72 #0 (FreeBSD 7.3) built 23-Jun-2010 02:07:21
Copyright (c) University of Cambridge, 1995 - 2007
Probably Berkeley DB version 1.8x (native mode)
Support for: crypteq iconv() IPv6 use_setclassresources Perl Expand_dlfunc OpenSSL Content_Scanning DKIM Old_Demime Experimental_SPF
Lookups: lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmnz dnsdb dsearch passwd
Authenticators: cram_md5 cyrus_sasl dovecot plaintext spa
Routers: accept dnslookup ipliteral manualroute queryprogram redirect
Transports: appendfile/maildir/mailstore/mbx autoreply lmtp pipe smtp
Fixed never_users: 0
Size of off_t: 8
OpenSSL compile-time version: OpenSSL 0.9.8e 23 Feb 2007
OpenSSL runtime version: OpenSSL 0.9.8e 23 Feb 2007
Configuration file is /usr/local/etc/exim/configure

i run majordomo lists. one list has almost 2800 subscribers. in the
last weeks, [some] folk subscribing to that list have gotten duplicate
mailings, four to six of them.

i wonder about the following (local names hacked to 'foo')

2010-08-31 16:33:51 1OqTiu-000JMa-IG SMTP error from remote mail server after RCPT TO:<foo@???>: host mx2.hotmail.com [65.54.188.126]: 452 Too many recipients
2010-08-31 16:33:51 1OqTiu-000JMa-IG SMTP error from remote mail server after RCPT TO:<foo_Standley@???>: host mx2.hotmail.com [65.54.188.126]: 452 Too many recipients
2010-08-31 16:33:51 1OqTiu-000JMa-IG SMTP error from remote mail server after RCPT TO:<foo@???>: host mx2.hotmail.com [65.54.188.126]: 452 Too many recipients
2010-08-31 16:33:51 1OqTiu-000JMa-IG SMTP error from remote mail server after RCPT TO:<foo@???>: host mx2.hotmail.com [65.54.188.126]: 452 Too many recipients
2010-08-31 16:33:51 1OqTiu-000JMa-IG SMTP error from remote mail server after RCPT TO:<foo@???>: host mx2.hotmail.com [65.54.188.126]: 452 Too many recipients

can i throttle down somehow to see if that helps?

randy