“ Error 432 4.3.2 STOREDRV.Deliver; recipient thread limit exceeded in Exchange 2016
September 17, 2020 at 3:33 pm Leave a comment
One of our customer complained that the Internal E-mails are not being delivered. When we checked the Queue Viewer we observed the emails are stuck at the queue with the error “Error- 432 4.3.2 STOREDRV.Deliver; recipient thread limit exceeded”
This could be due to large number of emails being sent internally(either to one mailbox / several mailboxes).In our case , the customer’s processing server was down for some days, and when it was restored it started sending all the backlog emails.
To overcome this issue we had to temporarily disable the throttling , by adding the below text in the EdgeTransport.exe.config file(located in the Exchange Bin Folder)
add key=”MailboxDeliveryThrottlingEnabled” value=”False”
(Some articled recommends to add the value in the MSExchangedelivery.exe.config file instead).
Thereafter , you need to restart the MS Exchange Transport & Exchange Mailbox Transport Delivery services.
In case if you don’t completely disable the throttling you could add the below keys.
add key=”RecipientThreadLimit” value=”2″
add key=”MaxMailboxDeliveryPerMdbConnections” value=”3″
Good Luck.
Entry filed under: Exchange and O365. Tags: 4.3.2, STOREDRV.Deliver; recipient thread limit exceeded.
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