this is not a HOWTO forum - this is a bug tracker - use the forum instead answer: this is not possible! changelog 2017-11-13 fixed in assp 2.5.6 Fortress build 17317: changed: If the filename for an attachment contains no extension, but the given Content-Type MIME header provides the filetype, the related extension is added to the file name to prevent unexpected blocked attachments. related to this change, the ASSP_AFC.pm Plugin is updated to version 4.71 ..... set AttachmentLog to diagnostic and...