[Dovecot] Test outgoing email on director setup

HI All,

I have a several Exim MTA's relaying mail to a pair of director proxies via LMTP which then relayi to several mailstores via LMTP   Incoming mail is working fine. 

My outgoing mail uses LMTP also in the reverse of above.   How do I manually test outgoing mail on the mailstores and proxies as I only have dovecot and not exim installed on them?

I have the following set in dovecot.conf for LMTP

 submission_host = mailproxy01:24 mailproxy02:24

Hopefully that works with multiple submission hosts to give redundancy?

Thanks

Murray