Problem Sending Email

Avast Free Antivirus / Premium Security
1

I have a rather strange problem sending emails using the Avast Antivirus program.

I have 2 PC’s the main one protected by Avast 4.0 and I often send attachments from this one to the other via email. Some time ago I noticed that attachments were being picked up by my ISP’s virus scanner, removed and a mail sent to notify me, but if I sent the same mails to both my other PC AND a different ISP email account (hotmail etc) the ones sent to other accounts were received fine.

At first I thought it must be a problem with my ISP’s virus software or operation of it, but after further testing it seems Avast is causing the problem in some way. If I sent an attachment of say 2MB in size with Avast turned on the ISP anti-virus will remove it and tell me. If I disable Avast and send it I will receive it fine.

I have just tested it now, sending a 2MB jpeg image from one PC to the other via the same email account. With Avast active my ISP picks it up as a virus and sends me a notification, with Avast disabled it sends and receives fine. I have narrowed it down to the Avast Internet Mail Provider but cannot see why this should happen

Does anyone any input as to why this would be?

I will now try removing and reinstalling Avast just to see if that helps

2

Just reinstalled Avast and the problem is still there :-/

3

It seems your ISP is identifying the headers of the messages.
There you’ll see X-Antivirus lines of avast! scanning.
Or it’s identitying the clean notes into your message bodies (if you set avast to add them).

I can’t see other thing that is changed while avast is scanning message. But it’s a weird behavior from your ISP to judge the state of an email by looking to these headers and judging, on contrary, that a clean message is contaminated :frowning: