How to block all emails out?

Hi, not sure if my laptop has a virus or not, but yesterday I saw a quick error message with something like “Unable to email the file …something… to …somewhere…”

I didn’t see the message long enough to read the file name or the “to” address and the message was gone.

I did a virus scan with MBam, Msoft Malicious Tools Scan and windows defender (win8.0) is up to date and scanning daily, but it all showed clear. I removed all Comodo “Trusted Files” and “Trusted Vendors” except the msoft ones so that I could see what would ask for Internet access. Nothing has asked since that error message.

Whatever it was, I do not need it emailing files home. I never use this laptop for email as I use my phone for that and I would like to block all outgoing emails on this laptop. I do sometimes check for incoming emails on the laptop so would like to leave that unblocked, but can live with blocking both incoming and outgoing if I have to.

I still need Internet access for browsing, so, how can I block emails only?


Hi, you might want to create a rule set in the Comodo firewall for your email application

I recommend setting your email client to using the email profile since it works for me.

Or if you wish to set your email client as a “blocked application” meaning it will not connect to the internet, you can do that through this help article by Comodo:

Thanks, but I have no email client on the laptop. I removed Outlook as soon as I got the thing. If it is a virus and MBam is not finding it, it may be an installed errant-email client. The notice I saw was so fast I was not able to see if there was an app name to the error. If it had stayed there I could have checked the TaskManager to see the app name.

I have gone back to an older image backup which I hope was before the issue, but have no way of telling. Emails go through specific Ports, but then, if it is/was a virus they may be using a different port anyway.

If it was blocked then the D+ and or Firewall logs will have flagged it because it is an apparent unknown file.