Question for Selfhosted mail server

Submitted ⁨⁨6⁩ ⁨months⁩ ago⁩ by ⁨AbidingOhmsLaw@lemmy.ml⁩ to ⁨selfhosted@lemmy.world⁩

I’m working on self hosting a e-cloud server ( for e/os phones). The mail server component of it wants to have a rDNS PTR record from my public IP back to mail.<myDomain.com>. I can’t do that since I’m using dDNS and my ISP won’t give me that ability unless I have business service (very expensive). The ISP I have is my only choice and I hate them. I have DNS Zones hoisted elsewhere to handle my dDNS scripts for everything but rDNS. So on tyo my question, Anyone know of a way to get a public IP service that will allow me to make a rDNS PTR entry and forward all traffic to my real public IP? Would that even work?

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ikidd@lemmy.world ⁨6⁩ ⁨months⁩ ago
I’ve done fine without a PTR for my mail server on a residential ISP for the last couple decades. I’d just give it a shot.

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- dukatos@lemmy.zip ⁨6⁩ ⁨months⁩ ago
  My server rejects hosts without proper PTR record, as it should.
  
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  - ikidd@lemmy.world ⁨6⁩ ⁨months⁩ ago
    And yet Google and Microsoft take my mail fine.
    
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chris@discuss.tchncs.de ⁨6⁩ ⁨months⁩ ago
Use your ISP’s or a trustworthy mail provider’s mail out to send outbound mail. Receiving mail on dyndns and no rDns should work without major problems. Ensure to configure SPF, dkim and dmarc accordingly. This can be a real challenge to get right on such a setup.

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Shimitar@downonthestreet.eu ⁨6⁩ ⁨months⁩ ago
Don’t selfhost email at home. Tons of reasons why won’t work, this is only the tip of the iceberg you are facing.

Indeed selfhost a mailserver, I do, but do it on a VPS. Of course, more the better, but a very cheap VPS is the bare minimum you gonna need.

No workaround there.

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- dogs0n@sh.itjust.works ⁨6⁩ ⁨months⁩ ago
  
  Don’t selfhost email at home. Tons of reasons why won’t work, this is only the tip of the iceberg you are facing.
  
  I disagree, but I do agree you can’t achieve this without business internet usually.
  
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  - Shimitar@downonthestreet.eu ⁨6⁩ ⁨months⁩ ago
    Sure you CAN do it, but it’s much more difficult than anything lse to self-host at home.
    
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- AbidingOhmsLaw@lemmy.ml ⁨6⁩ ⁨months⁩ ago
  I don’t actually NEED the e-mail server part, I wonder if there is a build for the e/os without the e-mail sync?
  
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Brkdncr@lemmy.world ⁨6⁩ ⁨months⁩ ago
Host your secure mail gateway on a service that lets you manage the ptr records. Alternatively outsource the SEG completely.

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anamethatisnt@sopuli.xyz ⁨6⁩ ⁨months⁩ ago
Find a VPS Service that allows you to handle your own rdns and then set it up as a reverse proxy for your e-cloud server.
Or skip the reverse proxy and use the VPS for your e-cloud server.

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IsoKiero@sopuli.xyz ⁨6⁩ ⁨months⁩ ago
DNS PTR records belong to the entity who owns the IP addresses, you can’t make reverse records for arbitary addresses like you can with forward zones. I haven’t heard about any residential ISP which would give access to PTR records and even on business lines that’s usually a premium.

What you could do is to get a VPN service which gives you these options, if there is one, I don’t know. Most likely you’re looking for a VPS for that and tunnel traffic with some kind of VPN-setup to your local instance. And at that point you might as well run the whole thing on VPS unless you happen to need a ton of storage or some other reason makes pure VPS server too expensive.

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