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我正在使用Action Mailer发送邮件活动的Rails项目。目前，我一直在用一个普通的旧GMail帐户测试所有的东西。现在接近发布，我决定将smtp服务器切换到我们的本地邮件服务器。调试SMTP超时错误
在我们尝试实际发送邮件之前，这一切都很好。有了这些新的SMTP服务器设置的邮件什么都不做，但超时：
MY_SMTP_SETTINGS = {
:address => 'oz.some.server.edu',
:port => 465,
:user_name => MY_USERNAME,
:authentication => :login,
:password => MY_PASSWORD
}
这是错误的堆栈跟踪我收到了一些时间，试图发送一个运动后：
Timeout::Error: execution expired
from /opt/local/lib/ruby/1.8/timeout.rb:60:in `rbuf_fill'
from /opt/local/lib/ruby/1.8/net/protocol.rb:134:in `rbuf_fill'
from /opt/local/lib/ruby/1.8/net/protocol.rb:116:in `readuntil'
from /opt/local/lib/ruby/1.8/net/protocol.rb:126:in `readline'
from /opt/local/lib/ruby/1.8/net/smtp.rb:911:in `recv_response'
from /opt/local/lib/ruby/gems/1.8/gems/ambethia-smtp-tls-1.1.2/lib/smtp-tls.rb:19:in `do_start'
from /opt/local/lib/ruby/1.8/net/smtp.rb:921:in `critical'
from /opt/local/lib/ruby/gems/1.8/gems/ambethia-smtp-tls-1.1.2/lib/smtp-tls.rb:19:in `do_start'
from /opt/local/lib/ruby/1.8/net/smtp.rb:525:in `start'
from /opt/local/lib/ruby/gems/1.8/gems/actionmailer-2.3.2/lib/action_mailer/base.rb:681:in `perform_delivery_smtp'
from /opt/local/lib/ruby/gems/1.8/gems/actionmailer-2.3.2/lib/action_mailer/base.rb:523:in `__send__'
from /opt/local/lib/ruby/gems/1.8/gems/actionmailer-2.3.2/lib/action_mailer/base.rb:523:in `deliver!'
from /opt/local/lib/ruby/gems/1.8/gems/actionmailer-2.3.2/lib/action_mailer/base.rb:395:in `method_missing'
from /Users/ryan/Development/gsoc/cohort/repo/app/models/freemailer_campaign.rb:39:in `send_campaign'
from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations/association_collection.rb:364:in `method_missing_without_paginate'
from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations/association_proxy.rb:219:in `method_missing'
from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations/association_proxy.rb:219:in `each'
from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations/association_proxy.rb:219:in `send'
from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations/association_proxy.rb:219:in `method_missing'
from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations/association_collection.rb:364:in `method_missing_without_paginate'
from /Users/ryan/Development/gsoc/cohort/repo/vendor/plugins/will_paginate/lib/will_paginate/finder.rb:167:in `method_missing'
from /Users/ryan/Development/gsoc/cohort/repo/app/models/freemailer_campaign.rb:37:in `send_campaign'
不要任何人有任何想法如何我可以查明我的问题？