Share images and insert them in your emails, too. Better than big attachments: upload your photos and signature images to a free image hosting service and send links or inline images via email. Of course, you can use these images in forums, auctions and elsewhere on the web as well.
Here are my favorite free image hosting services for use with email.
Particularly easy to use, imgur hosts your images and lets you edit them using Aviary, too.
ImageVenue holds your JPEG images up to 3 MB in size, and it can resize big pictures to reasonable dimensions at upload time, too.
You have to register for a free account at Photobucket, but then you get tools for organizing and editing your images. Photobucket supports JPEG, GIF, PNG and BMP files up to 1 MB for free users.
FreeImageHosting.Net stores JPEG, PNG, GIF and BMP images up to 3 MB for free and for use in your emails, forum posts, auctions, and more.
ImageShack hosts pictures up to some 1.5 MB for free and can resize them for easy including in emails, too. Supported image formats include JPEG, PNG, GIF; BMP, TIFF and SWF.
MojoImage stores images up to 2 MB and 3000x3000 px.
Upload and host images of most types at xtupload.com, which also lets you add border and watermark.
Iimmgg.com not only hosts up to 2048x2048 pictures for you, it also adds a tag line if you wish.