SPF Macro Hosting - Unlimited hostnames in your SPF record lets your exceed 10 hostnames
Some time has passed since my SPF Macro Hosting post where I uncover rbldsnd as an excellent DNS server to host compressed SPF Macro records.
The reason rbldnsd is so perfect, is that it handles IP and subnets in the exact format they are stored in an SPF record, being CIDR(e.g. ip4:192.0.2.0/29 or ip6:d:e:a:d::be:ef/128) which standard DNS like bind, unbound or powerdns cannot do. Instead, requiring *(wildcard) records that over authorise IP when using IPv6 and anything smaller than /24 in IPv4.
Today I launch a proof of concept service to highlight the capability of Expurgate Solo. This SPF hosting instance is hosted on a single instance of Amazon's service AWS Lightsail for $3.50/month - note using pypy on a low spec Lightsail instance will likely crash it, instead I've switched back to python 3.11.
I am currently hosting and compressing SPF records for 20+ service provider's domain names. Please reach out if you would like me to add another vendor.
https://xpg8.ehlo.email
I have also included links directly to Expurgate github and Expurgate Solo, where you can host your own SPF macro service.
Expurgate - SPF Macro Self Hosting (2 Docker containers)
Expurgate Solo - SPF Macro Self Hosting (1 Docker containers)
You can also lookup your domain names e-mail DNS records (e.g. MX, SPF, DMARC, BIMI, MTA-STS etc) records here
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