The messages cannot be zipped because avast is the one that creates them and attaches them to the email.
When someone receives an email with attachments called virus info.txt and virus info.htm, they think they are virus. Something like info.txt or info.htm without the virus part would be good. Or even avast info.txt. Just not virus or clean or scan etc in the name.
I don't understand why sometimes avast puts the clean message text into an email, and sometimes it makes attachments. I never see the messages avast puts in or attaches unless someone forwards the email back to me.
Would you like me to post a pic of what it looks like in an email?