Redmine

Hello experts, need your help. I am trying to configure tasks/issues creation from email. I am using plugin "Redmine Mail Checker"

https://github.com/jbox-web/redmine_mail_checker

Everything has been setup as suggested and here is my email configuration:

default:
email_delivery:
delivery_method: :smtp
smtp_settings:
address: "mailrelay.domain.local"
port: 25
domain: domain.com
openssl_verify_mode: none
enable_starttls_auto: false

I keep on getting error in log file: mail_checker.log

2020-11-16 15:55:24 -0500 [INFO] Checking IMAP mails
2020-11-16 15:55:25 -0500 [ERROR] SSL_connect returned=1 errno=0 state=SSLv2/v3 read server hello A: unknown protocol

Even below command does not work. No error is given.

rake -f D:/gmine/redmine/Rakefile redmine:email:receive_imap RAILS_ENV="production" host=exhybrid.XXXXXXgroup.local username=username@XXXXXXgroup.local password=password

Here is my redmine version information:

Environment:

Redmine version                3.4.4.stable
  Ruby version                   2.4.3-p205 (2017-12-14) [x64-mingw32]
  Rails version                  4.2.8
  Environment                    production
  Database adapter               Mysql2

Has anyone seen this issue? Any suggestions are highly appreciated.