Hello Rob,

On Monday June 08 2020 20:18, you wrote to me:

 >> I am aware that using the unix time stamp as the only way of
 >> generating sequence numbers is not a good idea. See FRL-1029.

 RS> Huh. You seem to be very proud of that document. I see nothing in
 RS> there about using Unix time stamps for MSG-ID serialno's

 4.8 A note on "increasing by at least one".

        Simply starting at zero and increasing the serial number by
        one for each number issued would be perfectly valid and
        satisfy FTS-0009. That is, provided  all applications running
        on a given system were to use this method, use the same serial
        number file and the serial number file is never lost.

        In practise these ideal condition may not be met so using a
        more sophisticated method of increasing the serial number than
        just increasing it by one may be preferred. Using the system
        clock to prime the number generator in case the serial number
        file is absent and to use the larger value of the system clock
        and the last number incremented by one for the next number may
        give reasonable insurance against the loss of the serial
        number file.


Cheers, Michiel

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