```ruby
require 'net/http'
require 'net/smtp'

# Example:
#   begin
#     some http call
#   rescue *HTTP_ERRORS => error
#     notify_hoptoad error
#   end

HTTP_ERRORS = [Timeout::Error,
               Errno::EINVAL,
               Errno::ECONNRESET,
               EOFError,
               Net::HTTPBadResponse,
               Net::HTTPHeaderSyntaxError,
               Net::ProtocolError]

SMTP_SERVER_ERRORS = [TimeoutError,
                      IOError,
                      Net::SMTPUnknownError,
                      Net::SMTPServerBusy,
                      Net::SMTPAuthenticationError]

SMTP_CLIENT_ERRORS = [Net::SMTPFatalError,
                      Net::SMTPSyntaxError]

SMTP_ERRORS = SMTP_SERVER_ERRORS + SMTP_CLIENT_ERRORS
```

Fix `TimeoutError` depreciation warning by using `Timeout::Error`
user
```ruby
require 'net/http'
require 'net/smtp'

# Example:
#   begin
#     some http call
#   rescue *HTTP_ERRORS => error
#     notify_hoptoad error
#   end

HTTP_ERRORS = [
  EOFError,
  Errno::ECONNRESET,
  Errno::EINVAL,
  Net::HTTPBadResponse,
  Net::HTTPHeaderSyntaxError,
  Net::ProtocolError,
  Timeout::Error
]

SMTP_SERVER_ERRORS = [
  IOError,
  Net::SMTPAuthenticationError,
  Net::SMTPServerBusy,
  Net::SMTPUnknownError,
  Timeout::Error
]

SMTP_CLIENT_ERRORS = [
  Net::SMTPFatalError,
  Net::SMTPSyntaxError
]

SMTP_ERRORS = SMTP_SERVER_ERRORS + SMTP_CLIENT_ERRORS
```
assistant