Problem Normal objects serialize to something like: — !ruby/object {}\n\n whereas Mail::Message serialize to:

Question

0

Editorial Team

Asked: May 23, 20262026-05-23T13:29:58+00:00 2026-05-23T13:29:58+00:00

Problem Normal objects serialize to something like: — !ruby/object {}\n\n whereas Mail::Message serialize to:

0

Problem

Normal objects serialize to something like:

"--- !ruby/object {}\n\n"

whereas Mail::Message serialize to:

"--- \nMime-Version: \"1.0\"\nbody: \"\"\nContent-Transfer-Encoding:[…]"

Question

How can I have Mail::Message serialized just like other objects?

Background

Gem Versions:

YAML: “0.60”
Mail: “2.2.19”

Code

Object.new.to_yaml #gives
"--- !ruby/object {}\n\n"

Mail::Message.new.to_yaml #gives
"--- \nMime-Version: \"1.0\"\nbody: \"\"\nContent-Transfer-Encoding: 7bit\nMessage-ID: <4dc418052be4a_16b62850c31ac91488@mbp.local.mail>\nsubject: \nContent-Type: text/plain\nDate: Fri, 06 May 2011 15:47:17 +0000\n"

Desired output