jvels
A panel is not really needed for adding whitelist entries for greylisting.
They are easy to add using the command line, and once added would probably not need to be removed.
Read this file
/usr/share/qpsmtpd/plugins/greylisting
and from this post at
http://forums.contribs.org/index.php?topic=34498.0 You could try white-listing the sending email host. This will selectively change the behavior of some of the subsequent qpsmtpd plugins, and might get your messages through...
To add a white-listed host:
config setprop qpsmtpd RequireResolvableFromHost yes
pico /var/service/qpsmtpd/config/whitelisthosts
(add the IP addresses you want to whitelist, one per line)
signal-event email-update
(Turning on "RequireResolvableFromHost enables the "whitelist_soft" plugin. Also, there's no default template for "whitelisthosts" so your changes shouldn't disappear by themselves. Ultimately, this should probably be templated and should use the configuration database...)