Hi Florian, Thanks for the input. I am with version 2.4.8 ... I did a research on this list and found a response (put FS instead DB for filesystem about attachments) but I don't know if my problem will be solved by doing this .. and even worse I don't the impact of such a change in the system ...) What do you mean by checking the attachments in the webmailer? The thing sure is that the file-1 (which is an html one, copy of the message) is created by OTRS (that point is sure) and it is from there that problem appears. But when you know that OTRS don't use ms-outlook in house that explains such bugs ... I have asked the team to forward me the original email (forwarding) to an other email address that is linked to a test system (separate install) but I am not able to reproduce the case) Does someone knows the impact of changing the DB (database) to FS (filesystem) for attachments? Many thanks Phil World Intellectual Property Organization Disclaimer: This electronic message may contain privileged, confidential and copyright protected information. If you have received this e-mail by mistake, please immediately notify the sender and delete this e-mail and all its attachments. Please ensure all e-mail attachments are scanned for viruses prior to opening or using.