Hi Christopher, I'm on the opendkim list also and it does get little attention.
Is the "delay" recorded in a typical Postfix log entry ? Stolen from Postfix 2.3.19: Postfix logs additional delay information as "delays=a/b/c/d" where a=time before queue manager, including message transmission; b=time in queue manager; c=connection setup time including DNS, HELO and TLS; d=message transmission time. These seem to be the only settings to bump up logging with opendkim: ## Log activity to the system log. Syslog yes ## Log additional entries indicating successful signing or verification of messages. SyslogSuccess yes ## If logging is enabled, include detailed logging about why or why not a message was ## signed or verified. This causes an increase in the amount of log data generated ## for each message, so set this to No (or comment it out) if it gets too noisy. LogWhy yes If your version supports it you may want to add this to your opendkim config file ? Or check "man opendkim.conf" for more options ? KeepTemporaryFiles (boolean) Instructs the filter to create temporary files containing the header and body canonicalizations of messages that are signed or verified. The location of these files can be set using the TemporaryDirectory parameter. Intended only for debugging verification problems. -- Sent from: http://postfix.1071664.n5.nabble.com/Postfix-Users-f2.html