Thank you for the quick reply. Is this the procedure you take to send an attachment?

Source: http://help.juno.com/support/webmail/u-attach-send-61.html

To send one or more attachments with your email, follow these steps:

1. While you have your message open, and you are ready to add the attachment, click the Attach a File.
2. Once you find the file you want to attach, select it and click Open.

Note: Depending on the size of your selected file, this process could take time as you upload it to Juno's mail server. Please be patient.

1. The name of your uploaded file will appear next to Subject text box, as well as its file size. You can see a running total of the size of your file attachments, as well as how much space remains available for more.

Note: Juno (with Juno MegaMail Plus, Juno MegaMail, Juno Platinum, and Free) can send outgoing message not exceeding (single message including attachment size) 30 MB, 20 MB, 10 MB and 10 MB, based on your service level. For more information about attachment limits, click here.

1. When you are done attaching files, click Finished. If you want to cancel your attachments, click Cancel.
2. If you want to send another attachment, follow the same procedure listed above.
3. If you want to remove an attachment, select it, then click Delete link next to the attachment name.

1. When you are ready to send your attachment(s) along with your message, click Send.