How to send e-mail with photo attached?

I want to send e-mail with photo. The best way in my opinion is to open any mail-client and put photo like an attachment.

I was trying do it by Application.OpenURL. I was trying by WWWForm. Actually - I’ve lost ideas.

I’m using Unity3D and NGUI. It have to work on Android and iOS.

Any ideas? I will be really grateful.

I ran into that same problem some time ago. This is what worked for me (only on Android tho). Maybe you can use smtp. I haven’t tried, but it seems it can work in both Android and iOS.

[Edit] The link to the smpt question didn’t have attachment, but the MailMessage class can have attachments. Check here.