<DNT> tag isn't case sensitive.

Using <DNT> tag works to not translate text, but <dnt> does not.
The tool should be able to treat the DNT tag, regardless of case.

The <DNT> tag will be seen in the original email but not in the translated one.

See EN and ES messages.

Q: Should the <DNT> tags be removed in the original email? I'm thinking it should

Re: attachments, new-transbot lists have a message and attachment limit of 200K

Given many PDFs will be larger, will be hard to test unless message size limit is raised

Tested with a smaller attachment, the attachment does go through. See EN and ES

Handling an email sent to both new-transbot-en and new-transbot-es lists at the same time.
When such an email to both lists happens, some emails don't get translated.