shepherdMaster https://blog.hatena.ne.jp/shepherdMaster/ 世界中の羊をかき集めて https://shepherdmaster.hateblo.jp/ Ruby mail gemを使っていて Non US-ASCII detected and no charset defined. Defaulting to UTF-8, set your own if this is incorrect. の様な警告が出る場合は、 mail.text_part do body 'あああ' content_type 'text/plain; charset=UTF-8' end mail.html_part do body 'あああ' content_type 'text/html; charset=UTF-8' end とするか、もしくは mail.text_par… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fshepherdmaster.hateblo.jp%2Fentry%2F2016%2F07%2F01%2F000000" title="mail gemで、「Non US-ASCII detected and no charset defined. Defaulting to UTF-8, set your own if this is incorrect.」と出た場合 - 世界中の羊をかき集めて" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2016-07-01 00:00:00 rich https://shepherdmaster.hateblo.jp/entry/2016/07/01/000000 1.0 100%