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Konstantinos Tsoukalas

Konstantinos is the founder and administrator of Since 1995 he works and provides IT support as a computer and network expert to individuals and large companies. He is specialized in solving problems related to Windows or other Microsoft products (Windows Server, Office, Microsoft 365, etc.).


  1. Sherman
    October 6, 2021 @ 6:26 am

    Thanks for the tutorial How to View Message Source in Mail Messages. A lot of good, practical information; if you use Outlook, Thunderbird, Gmail, Outlook for Web, & Yahoo.
    I came across your tutorial because I am trying to find a way to tell "" to STOP sending the message:

    Delivery to the following recipients failed permanently:

    * ""

    Reason: Permanent Error

    Mailer-Daemon is correct and will never be able to deliver the message because the email does have a Permanent Error —- the email does not exist; there is an error in email address.

    Ever few hours I get a repeat message from mailer daemon with the same message. Is there a way to tell mailer-daemon to STOP? Or how long do I have to put up with mailer-daemon – weeks, months— years? Any suggestions or tips would be appreciated.

    Second comment. I use Comcast email on Firefox. Is there a way to adapt your information to be used/useful to my Comcast email? Again, any suggestions or tips would be appreciated.

    Thanks for you support and tutorial.



    • lakonst
      October 6, 2021 @ 9:27 am

      Hello Sherman.
      1. Check your email address lists and your contacts list if the "" exists there and if yes remove it.
      2. To view Message Source in Comcast and to report Email Spam, see here
      3. I also suggest you follow the instructions in this article which may help you.


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