Running into an issue while sending an SMTP mail with v2.7.1 on Ruby 3.0.0 on container

[vinutha-g]

/usr/local/lib/ruby/3.0.0/net/protocol.rb:46:in `connect_nonblock': SSL_connect returned=1 errno=0 state=error: certificate verify failed (unable to get local issuer certificate) (OpenSSL::SSL::SSLError)
	from /usr/local/lib/ruby/3.0.0/net/protocol.rb:46:in `ssl_socket_connect'
	from /usr/local/lib/ruby/3.0.0/net/smtp.rb:624:in `tlsconnect'
	from /usr/local/lib/ruby/3.0.0/net/smtp.rb:600:in `do_start'
	from /usr/local/lib/ruby/3.0.0/net/smtp.rb:557:in `start'
	from /usr/local/bundle/gems/mail-2.7.1/lib/mail/network/delivery_methods/smtp.rb:109:in `start_smtp_session'
	from /usr/local/bundle/gems/mail-2.7.1/lib/mail/network/delivery_methods/smtp.rb:100:in `deliver!'
	from /usr/local/bundle/gems/mail-2.7.1/lib/mail/message.rb:276:in `deliver!'
	from /usr/local/bundle/gems/pony-1.13.1/lib/pony.rb:177:in `deliver'
	from /usr/local/bundle/gems/pony-1.13.1/lib/pony.rb:166:in `mail'

Please find the config below:

def self.send_using_options(options, environment)
        options[:from] = 'no_reply@company.com'
        options[:via] = :smtp
        options[:via_options] = {
          address: smtp_server_address(environment),
          port: '25',
          domain: 'company.com',
          enable_starttls: false
        }
        Pony.mail(options)
      end

We had run into a similar issue on Ruby 2.6.4 with mail v2.8.x, downgrading mail to v.2.7.1 resolved the issue.
With ruby uplift to 3.0.0 the issue has resurfaced even on mail v2.7.1