Net::OpenTimeout: execution expired

https://sentry.gitlab.net/gitlab/gitlabcom/issues/1376107/?referrer=gitlab_plugin

Net::OpenTimeout: execution expired
  net/smtp.rb:539:in `initialize'
    TCPSocket.open address, port
  net/smtp.rb:539:in `open'
    TCPSocket.open address, port
  net/smtp.rb:539:in `tcp_socket'
    TCPSocket.open address, port
  net/smtp.rb:549:in `block in do_start'
    tcp_socket(@address, @port)
  timeout.rb:103:in `timeout'
    bl.call(klass)
...
(133 additional frame(s) were not displayed)

execution expired