To use contact form, first check:
1. Config>Settings>Email>[x] AllowEmail is enabled
2. Config>Settings>Email>OwnerEmail is correct
If you have an issue 'Could not mail':
Here is small test for email functionality on your server.
https://www.photo.gallery/emailtest.php *
Success: www.photo.gallery OK
*Please don't abuse it, I'm getting email every time.
All it does - tries to email to me.
1. Download https://www.photo.gallery/emailtest.zip
2. Unzip and upload to your server
3. Try http://yoursite.com/emailtest.php
4. If it says OK - then email should work. (Mention your site name if it doesnt.)
5. If it FAILS - paste link to your emailtest in a message to your host support.
FAIL means something is misconfigured on server and function mail just... not mails. Which can be resolved only by your admin.
We're having test suite in or list too.