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I am experiencing a strange problem when receiving email attachments.
The files are valid XML files, but they have the file extension .usf or.xif.
When the emails are opened in Outlook and the attachments are saved, the file extension is changed to .xml?
I am using fastmail.fm as my server.
The senders are using webmail or Thunderbird.
Is this a problem with the sender, fastmail or outlook?
We logged in to Fastmails webmail system and the attachments had the original extension. – William Macdonald – 2012-12-07T10:49:57.070