multipart/alternative not displaying in Yahoo.com

Jean Louis <[email protected]>
Newsgroups gmane.comp.gnu.mailutils.bugs
Message-ID <[email protected]>
Hello,

When I send mailing, the multipart/alternative is not displaying in
Yahoo.com

When I receive email from leadpages.com into Yahoo, I can see they
have it as multipart/related that includes the multipart/alternative

Please review, how we can do it that it is really deliverable by using
mail from mailutils?

Imagine, sending multipart/alternative with text and html together is
displaying in Yahoo as having attachments. So something is certainly
wrong.

Do you know what?

Jean
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