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Tl dr; Is it possible to receive email for aliases of multiple domains on a single KVM?

I had a Digital Ocean server with multiple websites hosted on it, and needed email aliases of more than one of those domains. On several occasions, mail was not delivered, I believe it's possible that this is because the corresponding domain did not use a PTR record (Could be wrong.)

The PTR records with DO are tied to droplet names, so it seemed impossible to have PTR records for multiple domains, thus I was stuck with incomplete MX records and that may have been the cause of my undelivered mail.

I was thinking, there must be a way around this issue, besides renting another KVM.

Dave M
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Glenn
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1 Answers1

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Yes.

I'm not sure what you mean by "aliases', as this is usually referring to an email address the server can accept mail for, but will deliver the mail to a different user.

The PTR record in the context of a mail server is only for the purpose of Fordward Confirmed reverse DNS (FCrDNS) checks, which is performed only as a "proof of work" on a sending server by a receiving server. When used, it is only the address of the sending server domain (typically the hostname of the server such as mail.example.com). The PTR record will have nothing to do with your MX records and FCrDNS for your server will have nothing to do with receiving mail on your server.

The solution is to review /var/log/mail.log and determine what happened when the mail was delivered to the mail server and then fix that problem.

Paul
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