There are basically two methods of accomplishing this:
- Refusing your name to be added in other people’s contact list
- Making sure that your receive messages only from those listed on your contact list
Ensuring that others can’t add you to their contact list:
- Go to the Tools menu > Click on Options
- Click on the Privacy tab
- Select (tick mark) the checkbox situated next to ‘Alert me when other users add me to their contact lists’
- Click OK
Selecting this option ensures that every time someone tries to add your name to his/her contact list, your permission is sought. You then have the option of selecting the checkbox against ‘Block this person from seeing when you are online and contacting you’ or giving your consent.
Ensuring that you receive messages only from those mentioned in your contact list:
- Go to the Tools menu > Click on Options
- Click on the Privacy tab
- Select ‘All others from My Allow List’
- Click on Block
Choosing this option translates into anyone who isn’t on your contact list being rendered unable to send you any messages.