45.9 ‑‑fast4

Causes the MTA to monitor and process the priority 2 and 3 subdirectories with a separate scanner thread from the priority 4 through 7 subdirectories. See Section 44.2.3, Adjusting the Number of MTA Scanner Threads for the Domain and Post Offices.

Linux MTA

Windows MTA

Syntax:

‑‑fast4

/fast4

See also ‑‑fast0.