Why are some inbound email (sys_email) entries missing corresponding syslog_email records?

[maryellc]

Some of our inbound emails are being ignored and cases not created per defined workflows, and when investigating the sys_email table, some of the received-ignored records have email log (syslog_email) entries in the related list, while some do not.  For those that do not, we cannot investigate to determine why the email was ignored, and only guess.

Can anyone identify why the related email log is not created?

[SanjivMeher]

Can you check, if it is because of one of the reasons in the below thread

https://www.servicenow.com/community/itom-articles/emails-get-received-ignored-in-servicenow/ta-p/23...

[maryellc]

Why the email is being marked 'received-ignored' is not the primary problem.  We can assume it's because the user is inactive.  What this post was requesting was any help in determining why some received-ignored emails have no email log related entries, so we can clearly identify the reason why the email was ignored (and further actions not taken).  We have other received-ignored emails that are just as old that do have email log entries.