Forwarding external mail to external addresses – SPF, SRS, DKIM and Courier-MTA

Anyone who knows me knows how utterly frustrating I find the state of email today. It’s inherently insecure, absolutely relied upon, and there’s always someone who “didn’t get your email”. For larger businesses the offerings by Microsoft and the alike (Office365 for example) make sense.  For me however – it’s Courier-MTA on a Debian box. […]

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