How to Insert an Attachment at the Bottom of an Email
To attach a file or image at the bottom of an email rather than inline, complete the following steps:
In Mail, on the Mail toolbar, select New Message. Select Edit > Attachments > Insert Attachments at End. In the email body, select Attach. Browse to the file you want to attach, select it, and then select Choose File. Your attachment will appear at the end of your email message.
How to Change the Default Position of Attachments in Mail
To attach files elsewhere in your message, return to Attachments under the Edit menu and select Insert Attachments at End again to uncheck it. With this option off, you can add images and files anywhere in the body of an email.