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
Warning: Some sources claim that the RouterMaxConcurrentDeliverySize setting
represents KBytes. Assuming that the value of RouterMaxConcurrentDeliverySize
is KBytes and not its actual scale in Bytes can cause undesirable slow
No size limit
If you must constrain the router delivery size, a
reasonable value choice would be 1000000.
Configuration Document > Router/SMTP > "Maximum message size"
to limit the number of threads used for sending large messages
Domino Configuration Tuner:
This setting is included in the DCT
catalog of best practices.