535 Incorrect authentication data in Exim

exim failed @ A restart was attempted automagically.
Service Check Method: [tcp connect]

Failure Reason: TCP Transaction Log:
<< 220-serverX.xxx-xxxxxxxx.net ESMTP Exim 4.69 #12008 14:58:20 +0000
<<
<<
>> EHLO localhost
<< 250-serverx.xxx-xxxxxxxxxxx.net Hello localhost [127.0.0.1]
<<
<<
<<
<<
<<
>> AUTH PLAIN AF9fY3BhbmVsX19zZXJ2aWNlX19hdXRoX19leGltX19IY3VsTE dXcFpDNU1XM1c2OVU4dmdGSUlyQllwcHpuSVJwQVllYXhlVlh5 VU1FRmx5Slg0YVlVV2JEbkJYcmpVAHBFTlh0eGtMdkNsRkJvZ3 ROd0xZVVhTNlNWRlBHMUR6VEZBTG1naUFzQTc4Y0FlMW5HaHI4 VXBoa1R0N1FJa0U=
<< 535 Incorrect authentication data
exim: ** [535 Incorrect authentication data != 2]

Cmd Service Check Raw Output:

Here is the fix.

go to /var/cpanel/serviceauth/

remove the directory exim

cd /var/cpanel/serviceauth/
rm -rf exim

Restart Cpanel.
/etc/rc.d/init.d/cpanel restart

The folder exim will be recreated…

that should fix the issue.