Redmine

we have the below configuration on Redmine setup:-

Environment:
Redmine version 5.1.1.stable
Ruby version 3.0.2-p107 (2021-07-07) [x86_64-linux-gnu]
Rails version 6.1.7.6
Environment production
Database adapter Mysql2
Mailer queue ActiveJob::QueueAdapters::AsyncAdapter
Mailer delivery smtp
Redmine settings:
Redmine theme Default
SCM:
Git 2.34.1
Filesystem
Redmine plugins:
no plugin installed ################################################################################

production:
email_delivery:
delivery_method: smtp
smtp_settings:
enable_starttls_auto: true
address: "smtp.gmail.com"
port: 587
domain: "smtp.gmail.com" # or your domain
authentication: plain
user_name: "*********" # replace with your Gmail email address
password: "*********" # replace with your Gmail password or app-specific password

If you are experiencing issues where Redmine shows that emails are sent to other Gmail addresses but the emails are not visible in the recipient's Gmail account,