What is the max value for NX_MAIL_MAX_THREADS?

Document ID : KB000013311
Last Modified Date : 14/02/2018
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Question:

We are facing an issue with mail notifications sent out with delays. We have many notifications sent out in one hour.
We increased the option NX_MAIL_MAX_THREADS to the value 40 but it looks like this is not enough.
Can we increase this number higher than 40? Is there any limitation for this value?

Environment:
CA Service Desk Manager 12.9CA Service Desk Manager 14.1
Answer:

The option mail_max_threads is defined as "Specifies the maximum number of concurrent SMTP connections that can attempt to communicate with the server". 40 is the max value which is supported.