I think I have not explained well. Sorry for my bad english!!
We do not want to use the "epesi" folders. Our idea is that sent messages are saved in the "Sent" standar folder of our IMAP server. In this form we always have same regardless of the mail client used
The fact is that sometimes they are sent and saved perfectly, and other times the error is displayed, are sent but not saved in any folder
Attached two pictures of the setup we have, but we have tried several logic combinations and the result is the same
Could be a problem with server response time setup? It seems that the error occurs when it takes longer to respond, but we are not sure of this
Regards