Updating:
args = username_format=%Ln
under userdb did not fix my issue.
My server still rejects incoming emails with uppercase username e.g.
USERNAME@tld.
In /etc/dovecot/conf.d/auth-passwd-file.conf.ext, before I updated with your
suggestion i.e. %Ln, I had:
passdb {
driver = passwd-file
args = scheme=CRYPT username_format=%u /etc/dovecot/users
}
userdb {
driver = passwd-file
args = username_format=%u /etc/dovecot/users
I updated to
passdb {
driver = passwd-file
args = scheme=CRYPT username_format=%u /etc/dovecot/users
}
userdb {
driver = passwd-file
args = username_format=%Ln /etc/dovecot/users
FYI after I updated and tested sending an email with uppercase username again,
I ran
# systemctl reload dovecot postfix
also
# dovecot reload
What else can I try?
I tried args = username_format=%Lu too, in vain.
PS thanks for pointing that I should look at username_format rather than auth_
username_format
# dovecot -n
# 2.3.7.2 (3c910f64b): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.7.2 ()
# OS: Linux 5.4.0-156-generic x86_64 Trisquel GNU/Linux 10.0.1, Nabia
# Hostname: mail.redacted_tld
auth_mechanisms = plain login
auth_username_format = %n
mail_location = maildir:~/Maildir
mail_privileged_group = mail
namespace inbox {
inbox = yes
location =
mailbox Drafts {
auto = create
special_use = \Drafts
}
mailbox Junk {
auto = create
autoexpunge = 30 days
special_use = \Junk
}
mailbox Sent {
special_use = \Sent
}
mailbox Trash {
auto = create
special_use = \Trash
}
prefix =
}
passdb {
driver = pam
}
protocols = imap lmtp imap lmtp
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0660
user = postfix
}
}
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0600
user = postfix
}
}
ssl = required
ssl_cert = </etc/letsencrypt/live/mail.redacted_tld/fullchain.pem
ssl_client_ca_dir = /etc/ssl/certs
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
ssl_min_protocol = TLSv1.2
ssl_prefer_server_ciphers = yes
userdb {
driver = passwd
}
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