The single thread from August 2025, Exim ignoring /etc/default/exim4

[u34 at net9.cf]

That thread is at 
https://alioth-lists.debian.net/pipermail/pkg-exim4-users/2025-August/thread.html#start .
At August 2025 it had 4 messages.

At its 1st post, 
https://alioth-lists.debian.net/pipermail/pkg-exim4-users/2025-August/002523.html 
Terry M. Roy wrote

    SMTPLISTENEROPTIONS='-oX 25:465 -oP /var/run/exim4/exim.pid

The lack of the closing tick ("'") is copied from the original post. Can it be 
the origin of the problem?

At its 2nd post, 
https://alioth-lists.debian.net/pipermail/pkg-exim4-users/2025-August/002524.html 
Terry M. Roy wrote

    Found out by finally reading apt-listchanges that the use of 
/etc/default/exim4 is deprecated.

Is that found in changelog.Debian? I could not find a statement about
depreciation of /etc/default/exim4.