LinuxQuestions.org - Sendmail : mail reception problem - Lost input channel, did not issue MAI/EXPN/....

Hello,

I have a Fedora 15 server running sendmail/MailScanner/SpamAssassin.

For some reason I do not receive certain emails, while at the same time others are receive correctly.

Looking at the maillog file I've seen this log messages :

Quote:

May 29 18:00:47 servfc sendmail[22553]: AUTH: available mech=DIGEST-MD5 LOGIN PLAIN CRAM-MD5 ANONYMOUS GSSAPI, allowed mech=EXTERNAL GSSAPI KERBEROS_V4 DIGEST-MD5 CRAM-MD5
May 29 18:00:47 servfc sendmail[22553]: r4TFxbkv022553: Milter: no active filter
May 29 18:00:47 servfc sendmail[22553]: r4TFxbkv022553: --- 220 server.domaine.fr ESMTP Sendmail 8.14.5/8.14.5; Wed, 29 May 2013 18:00:47 +0200
May 29 18:00:47 servfc sendmail[22553]: r4TFxbkv022553: --- 421 4.4.1 server.domaine.fr Lost input channel from 5.mail-out.ovh.net [213.186.36.34]
May 29 18:00:47 servfc sendmail[22553]: r4TFxbkv022553: 5.mail-out.ovh.net [213.186.36.34] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA

I have plenty of others mail received with no problem. But for some IP addresses I receive those messages.

NOTE : I've changed the domain name in the logs to "server.domaine.fr"

I can't understand what's going on.

Anyone could help me ?

Thanks,

Regards,
Franck.