Pass through textEncoding to subnodes.

Author: artur-krueger

lib/mail-composer/index.js

@@ -475,6 +475,7 @@ class MailComposer {
         } else {
             node = parentNode.createChild(element.contentType, {
                 filename: element.filename,
+                textEncoding: this.mail.textEncoding,
                 disableUrlAccess: this.mail.disableUrlAccess,
                 disableFileAccess: this.mail.disableFileAccess,
                 normalizeHeaderKey: this.mail.normalizeHeaderKey