Postfix preseed for 24.04

[Balder Lindblom]

When installing 24.04 postfix is now part of the required packages. In a non-interactive installation, this can cause problems as the default values try to populate $myhostname using dns. To get a working installation, I used  debconf-get-selections | grep postfix after installing postfix with the "no configuration" option.

postfix     postfix/main_mailer_type      select      No configuration
postfix     postfix/mailbox_limit   string      0
postfix     postfix/procmail  boolean     
postfix     postfix/main_cf_conversion_warning  boolean     true
postfix     postfix/compat_conversion_warning   boolean     true
postfix     postfix/mailname  string      /etc/mailname
postfix     postfix/recipient_delim string      +
postfix     postfix/not_configured  error 
postfix     postfix/root_address    string      
postfix     postfix/relayhost string      
postfix     postfix/bad_recipient_delimiter     error 
postfix     postfix/dynamicmaps_conversion_warning    boolean     
postfix     postfix/rfc1035_violation     boolean     false
postfix     postfix/destinations    string      
postfix     postfix/newaliases      boolean     false
postfix     postfix/protocols select      
postfix     postfix/chattr    boolean     false
postfix     postfix/mynetworks      string      127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128

This ensures no aliases are created for postfix and hence the installation goes through.
Best regards
Balder Lindblom
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