grep in Postfix logfiles

Hello, I'm looking for a search tool to analyze Postfix logfiles. It should be something like a multiline grep application which is able to show all lines, which are related to one incoming mail. Mainly I want to search for the sender and the recipient at the same time. E.g. something like tha

SMTP access restriction lists

Hello, I intend to protect some internal email distribution lists in a way, which is described here: http://www.postfix.org/RESTRICTION_CLASS_README.html I would need to add "check_recipient_access ..." to the parameter "smtpd_recipient_restrictions". The actual value of this parameter in