topic Re: Static IPs and PBL in Email

Static IPs and PBL

kjpetrie — Tue, 20 Aug 2024 13:12:19 GMT

I have a static IP, but it gets listed on the Spamhaus PBL periodically. I have just had to remove it for the second time.

Since PN is reducing its support for e-mail in-house, it makes sense to allow customers with the knowledge and static IPs to run their own servers, but it does not make sense to include their IPs in the PBL in that case.

Would it be possible to ensure static IPs are not listed?

Re: Static IPs and PBL

Townman — Wed, 21 Aug 2024 09:17:24 GMT

You may run your own email server, but SMTP must be smart relayed via Plusnet's SMTP server.

Re: Static IPs and PBL

kjpetrie — Wed, 21 Aug 2024 12:05:44 GMT

But if I do that DKIM won't match my domains and mail will be rejected.

Re: Static IPs and PBL

MisterW — Wed, 21 Aug 2024 12:27:08 GMT

@kjpetrie any DKIM signing will be untouched by Smart relay. You will need to add the Plusnet relays to your SPF record though.

Add 'include _spf-internal.plus.net' and 'include _spf-internal2.plus.net'

Re: Static IPs and PBL

kjpetrie — Wed, 21 Aug 2024 22:30:24 GMT

You're right! I can use the relay without upsetting DKIM or DMARC. Well, I suppose that will do until PN decide not to provide SMTP relaying any more, at which point perhaps they'll delist the static IPs. I already have the necessary SPF entries as I only stopped relaying when I had to introduce DKIM to get mail accepted by Outlook and Google and needed to set up my own outward servers to get the right signatures on my domains. I didn't realise they could still be relayed.