[courier-users] Ubuntu and Courier upgrade

[Lindsay H. <fmo...@fm...>]

I'm in a bit of a corner. I'm running Courier 0.68.2 on Ubuntu 16.04
with esb support so that security on it is good. I have a lot of fairly
advanced customer-managed mail management features, some of them
depending on maildrop and various other characterisics of this version
of Courier (including the use of v4 addresses in trace headers of the
form "::ffff:a.b.c.d" hybrid v4/v6 format). The version of Courier in
the next available release is 0.78.0-2ubuntu2.

For a number of reasons I'll need to update the server OS fairly soon,
and will need to keep basic mail functions working for customers,
including the use of DEFAULTDELIVERY="| /usr/bin/maildrop" in courierd,
and all maildrop features.

Please advise me what as to what I'll need to watch out for, and any
suggestions to make this transition go smoothly will be VERY welcome.

-- 
Lindsay Haisley       | "Never expect the people who caused a problem
FMP Computer Services |  to solve it."  - Albert Einstein
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