I will warn you, the developers website is half russian (I think) and you can get lost there. But the install is straight forward and it handles pretty much everything like a charm. Also the documentation isn't all that great, but most Joomla users will have no probs.
So you all know, I bought the pro version.
Tekno_boy, thank you! We alway listen our users and in this way is just added new integration of "Post by Email" with Ignite Gallery. We are not russian, our site is 50% on Bulgarian, 50% in English. For this extension not exist Pro version - this was a old title from Joomla 1.5 years, is very popular name and is added to product description to find them in Google. Now product name is only "Post by Email" for Joomla - this is actual product that support both J15 and J25. Older version is "Post by Email Old" - only for J 1.5 in combination with very old versions of Kunena and Jomsocial.