Short Description: limit the message delivery for this mail to one router thread since
When enabled, this parameter will allow Router to open only one copy of a message at a time if it is greater than the size (in bytes) specified. This way the message will be delivered to each recipient using only one single thread.
Large message sent to large distribution lists can monopolize threads in the Router task, causing mail to back up. The RouterMaxConcurrentDeliverySize setting in NOTES.INI will allow the Router to open only one copy of a message at a time if that message is greater than the size specified (in bytes). This will cause the message to be delivered to each recipient using only one single thread, keeping other threads available for delivery of other mail. Setting this value too low can cause mail delivery to become undesirably slow.
If you must constrain the router delivery size, a reasonable value choice would be 1000000.
RouterMaxConcurrentDeliverySize=size in bytes
There is no kown UI setting for this notes.ini variable. But you can specify this setting in the notes.ini settings tab of the configuration settings document.