For at least the past few days (maybe longer, maybe forever), I'm getting a lot of these 2 types of messages, in my /var/log/exim_mainlog. Are these normal? failing spammers? Thanks.

this comes in about 1 every 1-2 minutes:
Code:
2004-10-28 21:34:37 unexpected disconnection while reading SMTP command from (videotron.ca) [65.74.xx.xxx]
Note the domain above has ranged from a university in finland to other international domains' isps to attbi.com.

this is more rare, about one every 10 minutes:
Code:
2004-10-28 21:34:52 SMTP command timeout on connection from (dyn-83-157-x-xx.ppp.tiscali.fr) [83.157.x.xx]