latex input: mmd-article-header
Title: Email Test
latex input: mmd-article-begin-doc
latex footer: mmd-memoir-footer

Link: user67@example.com.

Blockquoted: user67@example.com

Auto-links should not occur here: <user67@example.com>

or here: <user67@example.com>

And with the mailto bit:

Link: user67@example.com.

Blockquoted: user67@example.com

Auto-links should not occur here: <mailto:user67@example.com>

or here: <mailto:user67@example.com>