About this Add-on
The add-on returns separate matches for each "Received" header.
The add-on displays all "Received" headers if "(.*)" regular expression is used. To display specific part of the header change regexp in the add-on's options according to you needs.
For instance, to display the host where email came from the regular expression should match the first "Received" header added by recipient's smtp server, something like
"^from (.+?) by mx\.example\.com ".
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