Gmail – How to Delete an Attachment Sent in an Email

Upload the PSD file to Google Docs & share it over email. The advantage with this approach is that Google Docs Viewer will even let recipients view the file online with Google Docs Viewer instead of opening it with PhotoShop.

The easiest solution I see to this is BCCing account B on every email you send as account B from within account A. The only issues I see are:

• You have to add BCC every time
• They won't automatically show up in account B's Sent Mail label, but instead in the Inbox

To get around that second issue, you should be able to set a filter in account B to put email where account B is both sender and BCCed into the IMAP/Sent folder (can't filter into Sent Mail directly).

One side note is that Gmail is smart enough to not re-forward the email back to account A's inbox.

Another option would be resorting to using IMAP to manually copy messages back and forth, but that would be a lot less elegant and a lot more work.