To send any file as an attachment with an email in Yahoo! Mail.

1. Open your Yahoo! Mail account on http://www.yahoo.com
2. While composing a message, follow the Attach Files link.
3. Select Browse to select the file you want to attach on your computer.
4. Click Attach Files.
   

Yahoo! Mail now grabs the file from your computer and attaches it to the message you are currently composing. Additionally, every file you attach is scanned for known viruses automatically.

To add more files, select Attach More Files.

Attaching pictures in Gmail

To attach pictures in Gmail follow the below steps.

1. Open your Gmail account on http://www.gmail.com.
2. Click the Compose Mail link.
3. Click the Attach a file link.
4. Click the Browse button and browse to the image you wish to attach. Keep in mind that you cannot select multiple files at once. However, you can individually add each of the images or attachments you wish to add.
5. Click Ok.

If attached successfully, you should see a link with the attachment names in your e-mail. Once you're ready to send the message, click the Send button.

To attach pictures in Hotmail, follow the below steps.

1. Open your Hotmail account on http://www.hotmail.com.
2. Click the New Message link.
3. Click the Attach and then File link.
4. Click the Browse button and browse to the image you wish to attach. Keep in mind that you cannot select multiple files at once. However, you can individually add each of the images or attachments you wish to add.
5. Click Ok or OK and Attach Another if you wish to do more than one image.

If attached successfully, you should see a link with the attachment names in your e-mail. Once you're ready to send the message, click the Send button.