For 10 years now I've been running a Linux (CentOS 7) server, using Postfix to handle mail for a handful of users. Specifically, I'm running Postfix 2.2, because that is the most recent version yum will fetch from the current/default set of repositories.
Some users want to use GMail, so I have used an alias (in an aliases file) to forward their mail to their GMail account, making person at my.domain an alias for same_person at gmail.com Recently, users have told me they have discovered that mail has not reached them because it was rejected by GMail. The rejection mail I have seen says GMail rejected the message because the IP address of my server did not pass DKIM or SPF for the source of the email. I have set up SPF for my domain, but I don't think that is relevant to FORWARDING mail (is it?). So I'm not sure what to do next. Do I have to set up DKIM? Can I do that with Postfix 2.2? Robert. -- Robert Inder, 0131 229 1052 / 07808 492 213 Interactive Information Ltd, 3, Lauriston Gardens, Edinburgh EH3 9HH Registered in Scotland, Company no. SC 150689 Interactions speak louder than words
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