User at domain.tld doesn't exist (postfix error 550 5.1.1)

[soko.tica]

The solution was
auth_username_format = %Ln

in /etc/dovecot/conf.d/10-auth.conf

I saw it on another thread. Thanks Pascal

On Mon, Feb 22, 2016 at 3:11 PM, soko.tica <soko.tica at gmail.com> wrote:

> Hello list,
>
> I am trying to send an e-mail message from the local root to another local
> user (alias to root) on the same box. While it functions without dovecot,
> it doesn't work with dovecot installed. Local user is recognized, but local
> user at domain.tld isn't. While this option is turned on in postfix, I
> believe it has something with dovecot configuration, due to doveadm isnt'
> able to recognise user at domain.tld
>
> Bellow are the outputs of doveadm user username, doveadm user
> username at domain.tld, doveconf -n, tail -f /var/log/mail.log, cat
> /etc/aliases and postconf -n.
>
> Please advise. Thanks in advance.
>
> # doveadm user testuser
> field    value
> uid    1000
> gid    1000
> home    /home/testuser
> mail    maildir:~/Maildir
> system_groups_user    testuser
> ========================================
> # doveadm user testuser at mail.domain.tld
> field    valueuserdb lookup: user testuser at mail.domain.tld doesn't exist
> ======================================
> # doveadm user testuser at domain.tld
> field    valueuserdb lookup: user testuser at domain.tld doesn't exist
> =======================================
> # doveconf -n
> # 2.2.13: /etc/dovecot/dovecot.conf
> # OS: Linux 3.18.26-x1-64 x86_64 Debian 8.3
> hostname = mail.domain.tld
> lda_mailbox_autocreate = yes
> lda_mailbox_autosubscribe = yes
> lda_original_recipient_header = X-Original-To
> lmtp_save_to_detail_mailbox = yes
> mail_location = maildir:~/Maildir
> maildir_very_dirty_syncs = yes
> namespace inbox {
>   inbox = yes
>   location =
>   mailbox Drafts {
>     special_use = \Drafts
>   }
>   mailbox Junk {
>     special_use = \Junk
>   }
>   mailbox Sent {
>     special_use = \Sent
>   }
>   mailbox "Sent Messages" {
>     special_use = \Sent
>   }
>   mailbox Trash {
>     special_use = \Trash
>   }
>   prefix =
>   separator = /
>   type = private
> }
> passdb {
>   driver = pam
> }
> passdb {
>   driver = pam
> }
> plugin {
>   sieve = ~/.dovecot.sieve
>   sieve_dir = ~/sieve
> }
> postmaster_address = postmaster at mail.domain.tld
> protocols = lmtp
> service lmtp {
>   unix_listener /var/spool/postfix/private/dovecot-lmtp {
>     group = postfix
>     mode = 0600
>     user = postfix
>   }
> }
> ssl = no
> ssl_cert = </etc/dovecot/dovecot.pem
> ssl_key = </etc/dovecot/private/dovecot.pem
> userdb {
>   driver = passwd
> }
> userdb {
>   driver = passwd
> }
> protocol lmtp {
>   mail_fsync = optimized
> }
> protocol lda {
>   mail_fsync = optimized
> }
> ===============================
> # tail -f /var/log/mail.log
>
> Feb 22 13:21:01 uidigaa4 postfix/qmgr[4657]: 75E0722137: removed
> Feb 22 13:21:01 uidigaa4 dovecot: lmtp(4764): Connect from local
> Feb 22 13:21:01 uidigaa4 postfix/lmtp[4763]: 82EA222140:
> to=<testuser at mail.domain.tld>, orig_to=<root at mail.domain.tld>,
> relay=mail.domain.tld[private/dovecot-lmtp], delay=0.01, delays=0/0/0.01/0,
> dsn=5.1.1, status=bounced (host mail.domain.tld[private/dovecot-lmtp] said:
> 550 5.1.1 <testuser at mail.domain.tld> User doesn't exist:
> testuser at mail.domain.tld (in reply to RCPT TO command))
> Feb 22 13:21:01 uidigaa4 dovecot: lmtp(4764): Disconnect from local:
> Successful quit
> Feb 22 13:21:01 uidigaa4 postfix/qmgr[4657]: 82EA222140: removed
> =======================
> # cat /etc/aliases
> # See man 5 aliases for format
> postmaster:    root
> root: testuser
> ===================
> # postconf -n
> alias_database = hash:/etc/aliases
> alias_maps = hash:/etc/aliases
> append_dot_mydomain = no
> biff = no
> config_directory = /etc/postfix
> delay_warning_time = 4h
> inet_interfaces = all
> mailbox_size_limit = 0
> mailbox_transport = lmtp:unix:private/dovecot-lmtp
> mydestination = $myhostname localhost.$mydomain localhost $mydomain
> mydomain = domain.tld
> myhostname = mail.domain.tld
> mynetworks = [::ffff:127.0.0.0]/104 [::1]/128
> myorigin = $myhostname
> notify_classes = resource, software
> readme_directory = no
> recipient_delimiter = +
> relay_domains = $mydestination
> relay_transport = error
> smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
> smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
> smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
> smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
> smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
> smtpd_use_tls = yes
>
>