We send out html based emails to our clients (and in some cases prospects). These emails usually contain a logo, and between 1-5 hyperlinks (some which link to a PHP script) - but they're not bulk-spam emails. On some clients these emails go straight into the junk filter and they have to manually add us to the "Safe senders list", which is a pain.
Does anyone know of any software that I can buy, which allows me to check the email before sending. I want to check:
HTML Formatting & Standards compliance
Anything else that you can think of
Thanks as always.