Right now that is the only possible way to do this in Pegasus Mail.  You can enter a fixed Bcc: address however these will not be a copy self type message so you will not be able to send use the right click "Resend this message"

The graphic images pasted into messages that I send are not viewable in copies saved with "copies to self." Yet they are visable in copies sent to myself with cc or bcc. Any ideas on how to have them visible in copies to self ?

Not possible.  The attachment is not there and so the graphic cannot be displayed.

Saving attachments in copies to self has been a commonly requested feature for Pegasus Mail in the past. Frequently mentioned 
counter-argument: It's stupid blowing up your sent mails with files that have already been saved at different places on your harddisk. 
I can however think of some situations where this could be useful, e.g. if you change a document afterwards but need the exact 
version you sent again. Re-sending messages would also be more comfortable without having to attach all the necessary files again. 
Sending the message to yourself via CC or BCC solves the problem, but is more or less a workaround. Any hints on whether saving 
attachments in copies to self might be included in an upcoming version of Pegasus Mail?

Regards,
maltedcoffee

Any hints on whether saving attachments in copies to self might be included in an upcoming version of Pegasus Mail?

In this day and age of multi gigabyte disc drives and unlimited resources, there is no justification

for saving space as a reason for not including attachments.  In my case it would be impossible to search

for and find the attachments I sent if I later needed to.  I have thousands and thousands of documents

and images on my system.  IT IS ESSENTIAL that I keep all attachments sent with messages

kept with the sent messages in the SENT folder.  I hope I dont have to use a work around

by setting up another address to CC msgs to.

Thanks