Howdy. I'm wondering if anyone has a potential contact at 'lisco.com'. My server is getting 550s with the message "This system will not accept messages from servers/devices with no reverse DNS." for outbound mail to lisco. Our PTR records have been in place for ~3 years now and I don't see any DNS issues when I check using different hosts. I'm hoping it's a temporary network issue.
Thanks for the help. -Warren
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