LMTP or SMTP

[Mudasar]

Hi,

I have checked that by default user MTA is set to LMTP

zmprov ga o2sp@o2sp.com | grep MailTransport
zimbraMailTransport: lmtp:zm1.o2sp.com:7025

When i change it to smtp 25 port mail does not delivered in my mail box why?

What is the exect difference between lmtp and smtp



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[bdial]

smtp requires a mta, so if you're not running mta on that server, i.e. it's a mailbox server only, it won't be able to connect to it

lmtp uses a different port

[Mudasar]

LMTP use 7025 port in Zimbra, and my box is a complete email server, i mean mta, queuing and mailbox.