Major upgrade of mail server

[Oscar del Rio]

On 2021-07-08 1:29 a.m., Plutocrat wrote:
> First thing to note is that Ubuntu 18.04 is a Long Term Service 
> release, and will be supported until 2023. So no matter how naggy 
> Ubuntu is, you don't actually HAVE to upgrade at this point. You may 
> disable the prompt if if bothers you: just remove or comment out the 
> relevant file in /etc/update-motd.d/
>
> Now the pressure is off, and you have a bit more time, maybe the best 
> idea would be to build and configure a new server using Ubuntu 20, or 
> any other distro, and then migrate the data over to it with dsync. 
> That affords you an opportunity to test the new config before one 
> final sync, and switching the MX records to point to the new server.

It would also be a good opportunity to switch to using the official 
Dovecot repositories.
https://repo.dovecot.org/

>
>
> On 08/07/2021 09.15, Shawn Heisey wrote:
>> I have a mail server in AWS that is currently running Ubuntu 18.  
>> Every time I log in, I am reminded that I can upgrade to Ubuntu 20.
>>
>> On Ubuntu 18, the dovecot version is 3.3.0-1ubuntu0.3.  On Ubuntu 20, 
>> it is 2.3.7.2-1ubuntu3.  Many other packages, probably including the 
>> mysql server, would also be upgraded.
>>
>>