How to Stop Avast Injecting Signatures Into Your Emails

Ben Stegner 25-01-2016

Avast is a great antivirus program Stay Protected From Every Type Of Malware With Avast Free Antivirus Comprehensive malware protection doesn't need to cost a fortune. Many reputable free antivirus programs are equally effective as paid ones, and avast! Free Antivirus stands with the best Windows antivirus programs. Read More , but it has some annoying features that may be enabled without your knowledge. From irritating sounds to tracking your every move Is Your Antivirus Tracking You? Here's What You Need to Know Free antivirus software comes with a price: your privacy. It's time to switch to antivirus software that doesn't track you. Read More , even this good antivirus solution is flawed.


Avast quietly introduced a new annoyance last month, when it started appending signatures to your outgoing emails — without telling you. Yes, you wouldn’t even know the program was doing this unless someone told you, or if you saw an email from someone else and made the connection.

Even worse, they put this crap into all your outgoing emails whether you’re using desktop mail with Outlook or Thunderbird, or a web-based client like Gmail or Yahoo! mail.

You’ve probably worked hard to craft an email signature that leaves the right impression How To Ensure Your Email Signature Doesn't Give The Wrong Impression An email signature is your wave of goodbye. It's how you make an impression. Or not. Here are a few tips on what you can do with your own email signature. Read More , and having Avast hijack it without telling you is both a violation of trust and makes you look silly when sending important emails. If you decide this isn’t worth ditching Avast over, it’s easy to disable.

Open Avast by double-clicking the orange sphere icon in your notification area, or just search in the Start menu for Avast. Once in the program, click the gear icon in the top-right; you’ll be in the General tab. Now, just uncheck Enable Avast email signature to be rid of this nuisance.


There’s one other place you may want to check to ensure this is totally disabled. Switch to the Active Protection tab in the settings, then click Customize next to Mail Shield. Under the Behavior tab, uncheck Insert note into clean message (outgoing) (and you might as well uncheck the box for incoming clean messages, too, since it’s useless).

Did you notice this email signature on any of your emails? Will this make you stop using Avast? Let me know what you think of this scenario below!

Image Credit: wk1003mike via

Related topics: Antivirus, Email Tips, Online Privacy.

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  1. Evan
    January 26, 2016 at 12:55 am

    Thanks. I didn't know Avast was doing this. I am concerned that some of my emails ended up in spam folders because the signature has a link to their website in it.

    • Ben Stegner
      January 26, 2016 at 5:21 am

      I don't think that would be enough to send your email to someone's spam box, but it might be worth checking with anyone you sent an important email to in the last few weeks.

  2. Mike
    January 25, 2016 at 11:56 pm

    Made both adjustments and then sent myself a test email (Tbird - Hotmail),but the damn thing was still there!

  3. Harryover1
    January 25, 2016 at 10:03 pm

    Maybe a class action lawsuit might discourage Avast and any others from doing this...

    • Ben Stegner
      January 26, 2016 at 12:38 am

      That's not a bad idea, but I'd bet there's something in the Terms and Conditions everyone agreed to that lets Avast do stuff like this.

  4. Lou
    January 25, 2016 at 3:53 pm

    There is also, under General tab/Confidentiality (not sure about the last one, Avast is in French here), untick the last NEW option to share your data, if not interested.

    • Ben Stegner
      January 25, 2016 at 4:12 pm

      Yes, Avast has several checkboxes for collecting information if I'm not mistaken. This is annoying, too. Thanks for the tip!

  5. Anonymous
    January 25, 2016 at 1:12 pm

    My Windows machines don't have Avast, but if they did this would cause me to find a replacement. There is an obvious effort on Avast's part to hide from the user the fact that their sent emails are being appended with an advertisement. Not cool. If they were being up front and offering an opportunity to opt out I wouldn't have a problem, but the sneakiness is very off putting. If they will sneak this in, what else will they be willing to do without disclosing it to the user? It all comes down to trust.

    • Ben Stegner
      January 25, 2016 at 4:13 pm

      I absolutely agree. If it was a pop-up asking you to enable it, you could disable it and go on your way. But doing it without asking the user, AND making it so they can't see the signature load into their email drafts, is really shady.

      I used to love Avast and recommend it to everyone, but it's honestly stuff like this that makes me think they shouldn't be used anymore.

  6. stevew
    January 25, 2016 at 10:00 am

    Thanks - I don't mind supporting a firm's objectives when it asks me before hand, but underhand approaches are just that and don't deserve support.

    • Ben Stegner
      January 25, 2016 at 4:14 pm

      Exactly, and I feel the same way. It's ridiculous to do this with no warning at all.