How can I send a set of photos from iPhoto using my gmail address? I can email photos from iPhoto as follows:


Click on an event to open the folder.
Select photos (with shift and command).
Choose Email... from the Share menu.


This will send an email from my @me.com address.

How do I send photos from another email address (such as gmail)?

Of course I understand that I can Reveal in Finder... each photo individually and attach it to an email message. I can also run ImageMagick mogrify on the images and then send the result. I am looking instead for a quick method that lets me just click to select the photos and also gives me the option of sending down-sampled versions of the photos.
When you do this, you should get a dropdown selection box that has your various email addresses in it.  You can choose in there.  If your gmail doesn't show up there, then go to iPhoto in the menu, click Preferences, click Accounts, click the plus, click Email, click Add, click Gmail, and provide the relevant info.