Today, I tried another Flickr feature. It’s similar to what they have right now — upload by email. The difference is that after the photo uploaded, it will send a notification to Twitter, send an update status. If you’re familiar with Flickr’s Upload by Email, it should not be difficult at all.
First, you have to link your Flickr and Twitter account. Add your Twitter account into your Flickr profile, and do the next authentication process. After that, you should see the integration status (see image below).

You will have a special email address. Any photos sent to that address will be uploaded to your Flickr and a status update will be broadcasted to your Twitter status. The email address is similar to your regular email you use to upload photos to Flickr (by email). For example, if your private email address is [email protected], your other email will be: [email protected].
I tried it, and it works without any problem. The photo address will be shorten. (see image below)

I’m not actively using this upload-by-email feature, but it’s something useful and glad Flickr has it.