Hi!
The plugin works perfect for testing purposes so far but triggers a few unnecessary rules which result in the newsletter being treated as spam.
rules triggered for spamassassin(http://wiki.apache.org/spamassassin/FrontPage):
HTML_IMAGE_ONLY_$somenumber
how to avoid: send multi-part message or no images with html(the who is reading image..)
HTML_IMAGE_RATIO_$somenumber
how to avoid: send no big images with your message.. difficult to avoid this one every time
HTML_MESSAGE
how to avoid: i think multi-part message would also cure this
HTML_MIME_NO_HTML_TAG
how to avoid: send a leading <html> tag (and </html> on the end) tried adding this but gets filtered by easymail/wordpress?
MIME_HTML_ONLY
how to avoid: send multi-part message
being able to send a multipart newsletter which has a html and a text version would be really helpful for me