(1) the "old" server uses LMTP successfully

(2) one of the links says, "LDA is a short-running process" and "LMTP is a long-running process"

(3) other links tell me LMTP is the "newer" and "more secure" protocol

(4) re: transport -- I've tried

virtual_transport = lmtp:unix:private/dovecot-lmtp
virtual_transport = lmtp:unix:localhost
virtual_transport = lmtp:inet:localhost
mail_transport = lmtp:inet:localhost

I've not included the port (Should it be 587 or 24?)

(5) I've not disabled LDA

(6) Dovecot is using Port(s) -- 143, 993, 4190 -- Postfix is using Port -- 25

(7) I have monitored "/var/log/mail.log" and found only "samba" errors in "apport.log.1"

"samba" is running as well as "smbd" & "samba-ad-dc" -- I doubt they are causing my SMTP issue

I will try disabling LDA and modify the mail transport for Postfix (or configuring LDA more fully)

thx, Peter

On 01/16/2015 05:34 AM, Szládovics Péter wrote:
Any suggestions? Thx

What about getting rid of LDA and configuring LMTP directly in my "local.conf"?

Why do you prefer the lmtp instead of lda? Is it better/safer/quicker/anything? Did you set the postfix for LMTP (local_transport = lmtp:hostname:port) and disable the lda?
Did you check the port listening (fuser/netstat)?
Did you see the logfiles (mainly apparmor entries)?

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