It's most likely to be a signature. Unless she is using a MAC in which case it could be a *.applefile which is something the mail box is unable to print at this time

Dear Mark:

I had my customer service person check the log files and you are correct, all of the emails sent got through okay. However, the attachment error message seems to be pointing to a "winmail.dat" file that is attached to those emails. This is most likely some kind of signature file that is embedded as an attachment instead of being placed as plain text within the body of the email. Even though the recipient on a standard email system would see this, the Presto service detects it as an error. So, what I would say is to tell Julie to either not place her signature file on emails to your Mother, or disregard the error notices because she now knows why they are there.

Of course, we will look at creating ways to avoid this type of confusion when improving our service over time.

I hope this helps,

Peter

Presto Insider: Peter Radsliff
VP Marketing, Presto Services Inc.