Dave Goldman posted a very interesting post on his blog a little while ago, talking about how mailbox quota limit messages can impact Exchange server performance. He goes into different ways to customize the mailbox quota messages, how the process of firing those messages happens and in the end, how and under which circumstances Exchange Server performance could be impacted.
Definitely a good read. Head over here to read it!
Updated Jul 01, 2019
Version 2.0The_Exchange_Team
Microsoft
Joined April 19, 2019
Exchange Team Blog
You Had Me at EHLO.