Question re saslauthd with exim4

[scbates930]

Please describe the question or issue you're facing with "Install and configure Exim4 - Ubuntu Server documentation".
I followed the instructions, and find that I'm getting authentication problems\failures.

It appears to me that if you follow these instructions the saslauthd is using /etc/passwd for authentication not /etc/exim4/passwd
I was able to get the authenticaiton to work with a dummy user created via useradd but not using the documented script.
sudo /usr/share/doc/exim4-base/examples/exim-adduser

So the question is how to get the sasauthd to use the the /etc/exim4/passwd file and not the /etc/passwd file?

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Reported from: https://documentation.ubuntu.com/server/how-to/mail-services/install-exim4/