Trace you can send PSDs through email, though they will naturally be larger than jpg and gif files. PSDs can get big pretty fast and can exceed the size that some email accounts will accept.
What exactly are you trying to do? You should be able to send PSDs the same ways you can jpgs or gifs. The person on the other end will need to have PhotoShop installed to be able to view them.
Trace I think you can see that you can pretty much do the same things to send psd files as you can with gif and jpg files. The main consideration is that psd files will generally be a lot bigger in size.
Zipping them and sending them is easier and less hassle, but all of the above ways are fine, if I am working alot with one person I usually grab their msn and send files zipped via msn
__________________
All work submitted Copyright wooshdesign.com 2008 wooshdesign
All of the above mentioned ways are fine. I personally prefer zipping them with WinRAR before emailing. Or it quality's not a big issue here, you could compress the image in Photoshop, reduce pixel size, image size or something, before saving it.
*.PSD is type of file like any other (*.txt, *.zip, *.rar, *.jpg ......), and if You want , You can compress size (to get smaller), use Zip or Rar, and send it.
Now hold on...it's not THAT silly. A lot of mail servers and programs such as Exchange will block certain types of email attachments.
In the case of Exchange, however, PSD is not one of those attachments. So you should be fine from that standpoint.
Basically, I'd agree with what everyone else said. Send it if you can send it (file size is okay and it's not blocked at receiver's end.) If you have an issue, then FTP it.