Darren Pilgrim: > On 11/23/2014 8:42 PM, Peter wrote: > > On 11/24/2014 02:25 PM, Darren Pilgrim wrote: > >> You can't use policy services with the smtp client, only the smtp server. > > > > Weitse's proposal to use tcp tables is probably a better approach > > anyways, but you can use a policy daemon and route from smtpd. The > > point is you're routing *from* smtpd to a specific smtp transport. > > Nexthop transport isn't determined until after smtpd hands off the > message to cleanup.
Under very limited conditions, an SMTPD access table or policy server can specify a filter action like this: FILTER ipv4-only-transport: This will send mail over the ipv4-only-transport to the SMTP destination host. Wietse