[Mimedefang] mail server not issueing helo ro similar

[-ray]

On Sun, 18 Jan 2004, Lucas Albers wrote:

> How common is it for MTA's to not send a:
> helo or etrn commnad?
> 
> I see this in my logs:
> did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA

Is there a new worm/virus out that might be scanning for mail servers?  
I've seen a lot of these messages in the past weeek or so, and it caused 
sendmail to reach MaxChildren a few times.

ray