For any non-support questions, you can use this contact form. Also, feel free to comment on the site wherever comments are enabled. If you prefer direct email, I’m mikko at relevanssi.com.
I’m fluent in English and Finnish.
If you are a paying customer, do not use this form or post comments on the site. The support form is the way to go. You’ll get a much faster response.
If you have a problem with the free version of Relevanssi, please go through this checklist and then post to the plugin support forums.