hi; our fax device sending mails with header Content-Type: MULTIPART/MIXED (all uppercase), so this makes webmail not to open attachments; if i change only MULTIPART/MIXED (all uppercase) as multipart/mixed (all lowercase) webmail starts showing and opening attachments.
when i use filter to add header, it fixes it but deletes boundary header coming after Content-Type header. its a bug for webmail. how can we fix it