Re: [courier-users] Ubuntu and Courier upgrade

[Matus U. - f. <uh...@fa...>]

On 22.02.23 22:10, Lindsay Haisley wrote:
>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.

which one? I only see older versions in 
https://packages.ubuntu.com/search?keywords=courier

>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.

I only have experience with upgrading courier on debian, but the only 
important change was from openssl in debian8 to gnutls in debian9, which 
resulted into ignoring TLS_CIPHER_LIST, TLS_PROTOCOL and TLS_STARTTLS_PROTOCOL 
and using TLS_PRIORITY instead. 

this change happened about the time ubuntu 16/18 were released, courier-base in 
ubuntu18 seems already depend on gnutls
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