Hello Thom,
I have tried and no problems to use the same mail from Eldy Multi + Single Eldy, if properly configured.
I suggest the following settings:
- Eldy Multi
Protocol: IMAP
IMAP Server: imap.eldy.org
Imap port: 143
- Eldy Single User
Protocol: POP3
Pop Server: pop3.eldy.org
POP port: 110
Finally, it's true, the message "…… sent " appears only for a few seconds, but you can find the emails sent in Mail -> Read -> Sent Mail.
FAbio