cyrus messages format

[Patrice]

Hi,

I have read in the documentation of cyrus that message files in each 
mailboxes is
the message's UID followed by a dot (.)

when I look into one of my mailboxes I see files like:
45.
46.
.....


it is normal ? or should I have another kind of numbering ?
(when I delete all my files , and receive a new mail , the number will 
be 47 and not 0 )


Thank you for your help

Best Regards
Patrice

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