cPanel configures exim to use /etc/mailhelo when in transport stage in HELO. Since this is done, why not have cPanel also to take care of SMTP Banner, to be modified to show the dedicated account domain name, instead of the server hostname?
Customized workaround suggested here: http://forums.cpanel.net/f43/easy-fix-your-smtp-banner-smtp-greeting-reverse-dns-dedicated-ips-391311.html#post1577792
But don't we all hate further customization as admins?
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