Redmine

My system info:

Environment:
  Redmine version                4.2.1.stable
  Ruby version                   2.7.3-p183 (2021-04-05) [aarch64-linux]
  Rails version                  5.2.5
  Environment                    production
  Database adapter               Mysql2
  Mailer queue                   ActiveJob::QueueAdapters::AsyncAdapter
  Mailer delivery                smtp
SCM:
  Subversion                     1.13.0
  Mercurial                      5.3.1
  Cvs                            1.12.13
  Bazaar                         3.0.2
  Git                            2.25.1
  Filesystem                     
Redmine plugins:
  accept                         0.0.2
  additionals                    3.0.2
  issue_recurring                1.4
  localizable                    0.4.0
  redmine_checklists             3.1.18
  redmine_contacts               4.3.4
  redmine_contacts_invoices      4.1.8
  redmine_dashboard              2.7.1
  redmine_issues_tree            0.0.14
  redmine_lightbox2              0.5.1
  redmine_logs                   0.2.0
  redmine_mentions               0.0.1
  redmine_tags                   4.0.0
  redmine_theme_changer          0.4.0
  redmine_timelog_timer          2.0.1
  redmine_work_time              0.4.1

I am using mail aliases to pipe mail to mailhandler.

Unfortunately it fails when an e-mail contains an emoji/smiley see attached.

In receiving replay form server it initially is reported as possible permission problem:

                  The mail system

<support@domain.my>: permission denied. Command output: Request was denied by
    your Redmine server. Possible reasons: email is sent from an invalid email
    address or is missing some information.

Reporting-MTA: dns; domain.my
X-Postfix-Queue-ID: 3521C1760
X-Postfix-Sender: rfc822; my.mail@domain.my
Arrival-Date: Wed, 15 Sep 2021 11:40:37 +0300 (EEST)

Final-Recipient: rfc822; support@domain.my
Original-Recipient: rfc822;support@domain.my
Action: failed
Status: 5.7.0
Diagnostic-Code: x-unix; Request was denied by your Redmine server. Possible
    reasons: email is sent from an invalid email address or is missing some
    information.

but further investigations shows:

MailHandler: an unexpected error occurred when receiving email: Mysql2::Error: Incorrect string value: '\xF0\x9F\x98\x8A' for column 'description' at row 1: INSERT INTO `issues` (`tracker_id`, `project_id`, `subject`, `description`, `status_id`, `assigned_to_id`, `priority_id`, `author_id`, `created_on`, `updated_on`, `start_date`, `lock_version`) VALUES (3, 6, 'Fwd: Fwd: FW: Forems', 'Ttestam\r\n\r\nItkā sīkums, bet ja to var sakārtot, varbūt ir vērts