ok these go in to dovecot config file
switch various debug = yes
also make sure debug log path = syslog so everything goes to the system
logger
also best to try with ssl enabled first as that can cause complications
until you are up and running.
auth_debug = no
auth_debug_passwords = no
default_process_limit = 16384
mail_debug = no
#lock_method = dotlock
#mail_max_lock_timeout = 300s
#mbox_read_locks = dotlock
#mbox_write_locks = dotlock
mmap_disable = yes
dotlock_use_excl = no
mail_fsync = always
mail_nfs_storage = no
mail_nfs_index = no
#submission_host = 10.220.0.2:25
auth_mechanisms = plain login
auth_verbose = yes
base_dir = /data/dovecot/run/
debug_log_path = syslog
disable_plaintext_auth = no
dsync_features = empty-header-workaround
Thanks - Paul Kudla (Manager SCOM.CA Internet Services Inc.)
Have A Happy Monday AND Happy Sucessful 2026 !
Scom.ca Internet Services <http://www.scom.ca>
104-1009 Byron Street South
Whitby, Ontario - Canada
L1N 4S3
Toronto 416.642.7266
Main 1.866.411.7266
Fax 1.888.892.7266
Email [email protected]
On 2026-01-19 4:58 a.m., Aki Tuomi via dovecot wrote:
On 19/01/2026 11:53 EET Christophe Lohr via dovecot <[email protected]> wrote:
Le 19/01/2026 à 09:07, Aki Tuomi via dovecot a écrit :
Looks like the logs are missing all the useful things that would've hopefully
come after this. The error is coming from lmtp, not auth.
How can I ask Dovecot to produce more logs concerning lmtp?
From the postfix side I just have: "lost connection with
pc-serveur.my_domain.org[private/dovecot-lmtp] while receiving the
initial server greeting"
I'd like to know why...
Best regards
Christophe
Le 19/01/2026 `a 09:07, Aki Tuomi via dovecot a ecrit :
Looks like the logs are missing all the useful things that would've hopefully
come after this. The error is coming from lmtp, not auth.
How can I ask Dovecot to produce more logs concerning lmtp?
From the postfix side I just have: "lost connection with
pc-serveur.my_domain.org[private/dovecot-lmtp] while receiving the initial
server greeting"
I'd like to know why...
Best regards
Christophe
you can try
log_debug=category=lmtp
Aki
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