Domain hash size MTA option

Internal size MTA options:  (1-1000000)
The  MTA option controls the size of the domain  rewrite rules hash table. Each rewrite rule in the configuration file, or set in Unified Configuration, consumes one slot in this hash table, thus the number of rewrite rules cannot exceed this option&#x27;s value. The default is 512; the maximum allowed with normal, automatic resizing is 16,384 (controlled from the  file); the "hard" maximum number of rewrite rules allowed is 1,000,000. Attempts to set this option higher than 1,000,000 will result in an mm_init error, "DOMAIN_HASH_SIZE exceeds maximum". Attempts to specify more rewrite rules than allowed by this option&#x27;s maximum (normally the automatic, resizing maximum, unless a higher maximum has been explicitly configured) will result in an mm_init error, "no room in rewrite rule table for ...".

See also:
 * Internal size MTA options