On Tue, Nov 2, 2021 at 6:16 PM wes <[email protected]> wrote: > On Tue, Nov 2, 2021 at 6:05 PM Michael Barnes <[email protected]> > wrote: > > > What an ordeal. I have a security camera system that sends email alerts. > I > > used to send via Google, but they tightened up their security and I > cannot > > use that any more. I figured I'd just set up a simple mail server on an > RPi > > and do it myself. My ISP provides a static IP I can set up pretty much > > anything I want. I bought a domain name through hover.com for the > purpose, > > and set up A and MX records in their DNS. > > > > I finally got my mail server figured out and working and try to send > email > > to my normal account, which is promptly rejected by my email provider > > (IONOS) for a bad PTR record. (Mail does go to my gmail account without > > complaint.) I go into the dashboard for my domain to set the PTR record, > > and there is no option. I contacted tech support and get "Sorry, we do > not > > support PTR records. You will need to host your DNS with a 3rd party." > What > > he heck kind of domain registrar who provides DNS services does not > support > > PTR records? > > > > the first half of their answer is sensible, the second half is not. no DNS > provider can do what you're looking to do. > > > > > > Been browsing the Internet for DNS providers, and can't find anything > that > > tells me what they support. The few who I contacted said basically, "Sign > > up for our service to see what records we support." Seriously? > > > > yeah, that's ridiculous. > > > > It's been like 15 years or more since I did this kind of stuff. Got to > > learn it all over again. > > > > I would suggest that you begin by learning more about what a PTR record is > and how it's used. it is essentially a DNS record for an IP address - the > opposite of what we typically understand as a DNS record. this is often > referred to in shorthand as a "reverse DNS record." > > > > > > Anybody have suggestions on a free or cheap DNS provider that I can set > PTR > > and any other needed records? > > > > since a PTR record is set on the IP address, only the owner of the IP > address can set it. you will need to ask your ISP if they allow this. most > business-class providers allow it, most residential-class don't, and > everywhere in between will give different answers. > > alternatively, you can configure your mail server to announce itself as the > hostname that matches what's currently in your PTR record, if it exists. > this is not super trivial, it will involve a fair amount of work, but it > can be done. > > -wes >
Like I said, it has been many years since I've worked at this level and I have probably forgotten more than I knew in the first place. Thanks for your comments. After a little research, I think I understand the issue better. I do have a static IP through my ISP and they said my running servers should not be an issue, so I hope this is something they will accomodate. Thanks, Michael
