I've already tried with notepad ++ without success. in fact if I try to open with it, I'm mistaken for the file too large. I'm doing some tests, I'm definitely deleting messages on thunderbir to see if they still exist on webmail, once completely removed from thunderbird, they end up in the webmail basket, becoming gray with a prohibition symbol alongside access, if I click on it, the mail is normal and it is legible, if the mail in the incoming mail is also visible on thunderbird. now the doubt is that if you do not go for a certain period of time on the prohibition symbol, this completely eliminates the message from the server, I keep you up to date. thanks for the boys replies! as always, the best forum I have ever attended!