Re: imap-login not passing DSN through

I got somewhat further.


When setting

submission_backend_capabilities = DSN 8BITMIME

in 20-submission.conf, DSN works.


But:

The comment says

# Part of the SMTP capabilities that the submission service can offer to the
# client (as listed in the EHLO reply) depend on those capabilities also 
being
# provided by the relay server. These capabilities currently are:
#
#   - 8BITMIME
#   - BINARYMIME
#   - DSN
#   - VRFY (always returns 252 without support)
#
# By default, the submission service first connects to the relay server to
# determine the support for such capabilities before sending the initial 
EHLO
# reply to the client. If the list of capabilities returned by the relay 
server
# is somehow unreliable or it is undesirable to start the connection to the
# relay server before the first mail transaction is started, the backend
# capabilities can be configured explicitly using the
# submission_backend_capabilities setting. This is a space-separated list of
# SMTP capability names. This setting is only relevant for capabilities that
# depend on support from the relay server: including (or omitting) 
capabilities
# that are not listed above has no effect. When this setting is 
explicitly set
# to the empty string, none of the capabilities is enabled. To achieve the
# default behavior, this setting must be left unconfigured.

However, I do not see dovecot connecting to postfix after connecting to 
dovecot-login and entering "ehlo ...".

There is no connect to localhost:587 until transmission of the message 
has started (and too late to issue an ehlo response...)





regards

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