Redmine

rake -f /usr/share/redmine/Rakefile redmine:email:receive_imap RAILS_ENV="production" host=addess port=25 username=abc@xyz.com password=xyz ssl=1 --trace
When I run above command issue got created but after that it stop working and started throwing below error:

• Invoke redmine:email:receive_imap (first_time)
• Invoke environment (first_time)
• Execute environment
• Execute redmine:email:receive_imap
  rake aborted!
  getaddrinfo: Name or service not known
  /usr/lib/ruby/1.8/net/imap.rb:888:in `initialize'
  /usr/lib/ruby/1.8/net/imap.rb:888:in `open'
  /usr/lib/ruby/1.8/net/imap.rb:888:in `initialize'
  /usr/share/redmine/lib/redmine/imap.rb:29:in `new'
  /usr/share/redmine/lib/redmine/imap.rb:29:in `check'
  /usr/share/redmine/lib/tasks/email.rake:133
  /usr/lib/ruby/1.8/rake.rb:636:in `call'
  /usr/lib/ruby/1.8/rake.rb:636:in `execute'
  /usr/lib/ruby/1.8/rake.rb:631:in `each'
  /usr/lib/ruby/1.8/rake.rb:631:in `execute'
  /usr/lib/ruby/1.8/rake.rb:597:in `invoke_with_call_chain'
  /usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
  /usr/lib/ruby/1.8/rake.rb:590:in `invoke_with_call_chain'
  /usr/lib/ruby/1.8/rake.rb:583:in `invoke'
  /usr/lib/ruby/1.8/rake.rb:2051:in `invoke_task'
  /usr/lib/ruby/1.8/rake.rb:2029:in `top_level'
  /usr/lib/ruby/1.8/rake.rb:2029:in `each'
  /usr/lib/ruby/1.8/rake.rb:2029:in `top_level'
  /usr/lib/ruby/1.8/rake.rb:2068:in `standard_exception_handling'
  /usr/lib/ruby/1.8/rake.rb:2023:in `top_level'
  /usr/lib/ruby/1.8/rake.rb:2001:in `run'
  /usr/lib/ruby/1.8/rake.rb:2068:in `standard_exception_handling'
  /usr/lib/ruby/1.8/rake.rb:1998:in `run'
  /usr/bin/rake:28

Please let me know how I can resolve the same.