docker deployment - roundcube - failed to add recipient

[Umlatt]

Good day

I really like iRedmail so far.

I am running into an issue which is stopping me from progressing (it may be my own misunderstanding, but have not found any information to correct it yet).

Problem

Using the docker deployment (stable edition), I am receiving an error when attempting to send emails.

SMTP Error (451): Failed to add recipient "target_email_address" (4.3.0 <mail@domain>:  Temporary lookup failure).

One variation from the source is that I needed to create new SSL certs as there was a certificate error when connecting to the web portals (changed the files according to the official docs

It appears that the docker container is deployed in the same fashion as iRedMail Easy platform.

Hence I moved my corrected certs into the paths identified in the warnings.

---

REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER:

• iRedMail version (check /etc/iredmail-release): 2021091301 (mariadb backend, dockerized eidtion: https://www.iredmail.org/)
• Deployed with iRedMail Easy or the downloadable installer? docker deployment
• Linux/BSD distribution name and version: Ubuntu 20.04.3 LTS
• Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
• Web server (Apache or Nginx): Nginx
• Manage mail accounts with iRedAdmin-Pro? No
• [IMPORTANT] Related original log or error message is required if you're experiencing an issue.

Logs & Error messages

/var/log/mail.log

Sep  9 19:35:08 mail postfix/pickup[888]: 4MPR643ZBnz5vvc: uid=0 from=<[email protected]>
Sep  9 19:35:08 mail postfix/cleanup[889]: warning: proxy:mysql:/etc/postfix/mysql/sender_bcc_maps_user.cf lookup error for "[email protected]"
Sep  9 19:35:08 mail postfix/cleanup[889]: warning: 4MPR643ZBnz5vvc: sender_bcc_maps map lookup problem -- message not accepted, try again later
Sep  9 19:35:08 mail postfix/pickup[888]: warning: maildrop/4MPQkP3v1Lz5vlB: error writing 4MPR643ZBnz5vvc: queue file write error

After some research, using the credentials found in: /etc/postfix/mysql/domain_alias_maps.cf

#
# This file is managed by iRedMail Team <[email protected]> with Ansible,
# please do __NOT__ modify it manually.
#

hosts       = 127.0.0.1:3306
user        = vmail
password    = 5q9bd--------------wy1xCetf
dbname      = vmail
query       = SELECT forwardings.forwarding FROM forwardings,alias_domain,domain WHERE alias_domain.alias_domain='%d' AND forwardings.address=CONCAT('%u', '@', alias_domain.target_domain) AND alias_domain.target_domain=domain.domain AND forwardings.active=1 AND alias_domain.active=1 AND domain.backupmx=0

The following access denied error occurs when attempting to connect to the db as the vmail user

root@mail:/# mysql -u vmail -p
Enter password:
*Password is supplied as above (i.e. 5q9bd--------------wy1xCetf)
ERROR 1045 (28000): Access denied for user 'vmail'@'localhost' (using password: YES)