The maximum number of Private mail messages stored in your Inbox is 500. Every new message above 500 removes the oldest in this section.
All messages older than 30 days are removed from the corresponding section, with the exception of ones that were added to the Favorites section.
The Favorites section has a limit of 100, so when this number is reached, you need to remove a message from this section in order to add a new one.
When you add a mail conversation to the Favorites section, it is stored in its current state (no new messages from the same thread will be added later) and takes up as many Favorites slots as there are messages in the conversation.
The Ignored Players section shows you a list of players you've ignored and allows you to un-ignore them. The list is limited to 50 players and upon reaching this limit, players cannot be added to it before others are first removed.
All messages older than 30 days are removed from the corresponding section, with the exception of ones that were added to the Favorites section.
The Favorites section has a limit of 100, so when this number is reached, you need to remove a message from this section in order to add a new one.
When you add a mail conversation to the Favorites section, it is stored in its current state (no new messages from the same thread will be added later) and takes up as many Favorites slots as there are messages in the conversation.
The Ignored Players section shows you a list of players you've ignored and allows you to un-ignore them. The list is limited to 50 players and upon reaching this limit, players cannot be added to it before others are first removed.