How many contacts can you have on Windows Live Messenger?

Answer 1

The maximum in older versions was 300 but this was increased to 600 in 2005. It has now become more complex, however.

A post from www.msghelp.net provided this list:

List: "MSN Messenger Contacts"
Description: The e-mail addresses of your contacts.
Limit: 300

List: "Hotmail and Messenger Contacts"
Description: All the contacts in your Hotmail and MSN Messenger address books.
Limit: 1000

List: "Allow"
Description: Contacts who are permitted to view your online status and send you instant messages.
Limit: 1200

List: "Block"
Description: Contacts who are not permitted to view your online status or send you instant messages.
Limit: 1000

List: "Reverse"
Description: Microsoft Passport Network customers who are interested in viewing your online status. They may or may not have permission to view your online status.
Limit: 1000

List: "Pending"
Description: Passport Network customers who want to view your online status, but you have not yet granted them permission.
Limit: 40

List: "Groups"
Description: Customer defined groups. The default groups are Online, Offline, and Mobile.
Limit: 100
List: "Contacts in a group"
Description: The number of individual contacts in a group.
Limit: 150