Identifying Emails of Interest

dupReport scans the identified mailbox looking for backup job emails. However, there may be hundreds (or thousands) of emails in the inbox, only a few of which contain information about Duplicati backup jobs. dupReport identifies "Emails of Interest" by matching the email's subject line against a pattern defined in the dupReport.rc file. If the pattern matches, the email is analyzed. If the pattern does not match, the email is ignored.

The default pattern it looks for is the phrase "Duplicati backup report for" which is the default used for Duplicati's “send-mail-subject” advanced option. You can change the text that dupReport tries to match by adjusting the subjectregex= option in the [main] section of the dupReport.rc file. subjectregex is the regular expression definition for the desired phrase. The default for this option is:

[main]
subjectregex=^Duplicati Backup report for 

If you change the subjectregex option, be sure that it will match the text specified in the Duplicati send-mail-subject advanced option or you will not be able to properly match incoming emails.

Several users on the Duplicati Forum have found different ways to modify subjectregex= to get more control over finding Emails of Interest. This idea from dcurrey shows one way to specify what types of report emails you are looking for. This post from Marc_Aronson shows another approach.