[exim] exim-4.92: GSSAPI authenticator doesn't work

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Author: Frank Richter
Date:  
To: exim-users@exim.org
Subject: [exim] exim-4.92: GSSAPI authenticator doesn't work
Hello,

after upgrading to exim-4.92 (EPEL exim-4.92-1.el6.x86_64) our gssapi
authenticator doesn't work any more.

mainlog:
2019-06-20 14:10:10 gssapi authenticator failed for /hostname/ [/IP/]: 501
Authentication cancelled

In exim.conf in authenticators we have:

gssapi:
    driver = cyrus_sasl
    public_name = GSSAPI
    server_set_id = $auth1

After dowgrading to exim-4.91 package it works again.
klist shows the service principal for smtp on the client side.

Has anybody some hints for this … how to debug etc.?

Thanks in advance,
Frank

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Frank Richter
Chemnitz University of Technology, Germany