From Shade Software Solutions :
YASCU Mail is tiny 100KB zero configuration mail client designed to provide a simple and efficient process of emailing screenshots and attachments via drag n drop. It works in tandem with Yascu and/or Yascu Mirror and also works as a standalone application.
Instead of using the time consuming process of attaching files via webmail, or installing and configuring a large mail client application, users can save time and boost productivity by dragging and dropping file attachments up to 4MB into Yascu Mail and sending via email in one click. Yascu Mail is available as a free add-on for all users in the Yascu community. Free CE version limits the attachment size to 1024KB and file types to JPG, PNG, GIF, and PDF.
Yascu Pro users can send any attachment filetype, with larger file sizes, and also run multiple instances of Yascu Mail
Yascu Mail 2.0.240 is now part of the Yascu Kit installer with all other related Yascu products included. Users can now specify their own outgoing mail server. Total attachment size increased from 800 KB to 1024 KB in free CE version and now allows PDF attachments. Yascu Pro users can send any filetype, and larger file sizes, and also run multiple instances of Yascu Mail