SPF is even easier and doesn't require anything on the mailserver. You just specify via a DNS TXT record what IP addresses are authorized to send mail from the domain, and what action you recommend for mail from any other IP addresses. Perhaps the only action you would take on your own mailserver is what to do if you receive spam spoofing your domain as the sender.
-----Original Message----- From: Blueonyx <blueonyx-boun...@mail.blueonyx.it> On Behalf Of Adam Lepp Sent: Friday, July 29, 2022 12:56 PM To: 'BlueOnyx General Mailing List' <blueonyx@mail.blueonyx.it> Subject: [BlueOnyx:25549] Re: DKIM A long-time client informed me today that RoundCube emails sent to Gmail bounce back, and the rejection message says no SPF or DKIM found. This was never previously an issue. I've installed DKIM on my DNS via a Plesk server, and it's quite easy. Gmail problems were fixed immediately. In referencing a previous thread, “yum install opendkim” says no package available. 5209R / CentOS Linux release 7.9.2009 (Core) at Virtbiz. Can anyone help, please? ----------------------------------- From: Blueonyx <blueonyx-boun...@mail.blueonyx.it> On Behalf Of Meaulnes Legler Sent: Friday, July 8, 2022 10:56 AM To: BlueOnyx General Mailing List <blueonyx@mail.blueonyx.it> Subject: [BlueOnyx:25501] DKIM hello I presume some of you think that DKIM is more snake oil than an effective remedy against spam, but I still want to give it a try... So many e-mails sent from my server get tagged in the recipient's mailboxes that an improvement of that server's reputation in all those databases (they moan «not signed with DKIM») might maybe help. Instructions at e.g. https://www.agari.com/email-security-blog/dkim-setup/ say that one has to install a DKIM package like OpenDKIM (http://opendkim.org/) Now, is this compatible with BlueOnyx? Has anyone done this before and could explain how-to? I don't want to mess around with stuff I'm not really used to like compiling and such... Thank you and best regards で⊃ Meaulnes Legler Zurich, Switzerland +41¦0 44 260-1660 _______________________________________________ Blueonyx mailing list Blueonyx@mail.blueonyx.it http://mail.blueonyx.it/mailman/listinfo/blueonyx _______________________________________________ Blueonyx mailing list Blueonyx@mail.blueonyx.it http://mail.blueonyx.it/mailman/listinfo/blueonyx
