Use_IPv6 — Affects the selection of IPv6 hosts in the SMTP client
Use_IPv6 = false
Use_IPv6 = true
When set to false, Momentum will ignore
AAAA records in the list of hosts resolved from MX lookups. This will effectively prevent the use of outbound IPv6 SMTP connections. The AAAA records will not be visible in the output of the dig console command either.
For a discussion of using IPv6 addresses with listeners, see the section called “Listeners and IPv6 Addresses”.
use_ipv6 is valid in the global scope.