Manually maintaining flattened SPF records in Route53 when including many authorized senders. It is catalogued under Other infrastructure on PulseGate.

Who should use spf53?

spf53 is an open-source project built for developers and sysadmins managing email infrastructure.

Does spf53 have a free plan?

Yes — spf53 is open source under the MIT license and free to use.

What platforms does spf53 run on?

spf53 runs on the command line. It can also be self-hosted.

Is spf53 still maintained?

Unverified. spf53 has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to spf53?

Similar projects tracked by PulseGate include Proximity Kit, rate-limit-handoff, and octodns-route53.

Is spf53 open source?

Yes — spf53 is open source under the MIT license.

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spf53

PyPIInfrastructure

spf53 is a self-hosted tool that automatically flattens SPF records for AWS Route53. It helps maintain valid SPF records when including many authorized senders by periodically re-flattening and updating the DNS records. Designed for developers and system administrators managing email authentication and DNS infrastructure.

Open SourceMITCLISelf-hosted

Visit PyPI

Overview

4 features

spf53 sits in PulseGate's Other infrastructure category. Manually maintaining flattened SPF records in Route53 when including many authorized senders. spf53 is an open-source project aimed at developers and sysadmins managing email infrastructure. spf53 is open source under the MIT license. It ships for the command line, and it can be self-hosted.

spf53 first shipped in 2026. Among its 4 catalogued features are SPF Flattening, Route53 Integration, and Automatic Updates. It exposes integrations via a public API.

Summary written by a language model from the project’s public pages.

SPF Flattening
Route53 Integration
Automatic Updates
Self-hosted

Built with & integrations

Connectors

API

Runs on

CLISelf-hosted

Trust & compliance

License

MIT

Verified signals

HTTPSOpen Source

Indexing history

What PulseGate has recorded for this listing

Indexed23 Jul · 00:38 UTC
spf53 verified via PyPI Fresh Feed
Source: PyPI Fresh Feed · Open

Frequently asked questions about spf53

What does spf53 do?: Manually maintaining flattened SPF records in Route53 when including many authorized senders. It is catalogued under Other infrastructure on PulseGate.
Who should use spf53?: spf53 is an open-source project built for developers and sysadmins managing email infrastructure.
Does spf53 have a free plan?: Yes — spf53 is open source under the MIT license and free to use.
What platforms does spf53 run on?: spf53 runs on the command line. It can also be self-hosted.
Is spf53 still maintained?: Unverified. spf53 has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to spf53?: Similar projects tracked by PulseGate include Proximity Kit, rate-limit-handoff, and octodns-route53.Proximity Kit rate-limit-handoff octodns-route53
When did spf53 launch?: spf53 first shipped in 2026.
Is spf53 open source?: Yes — spf53 is open source under the MIT license.

At a glance

Platforms: CLI
Languages: English
License: MIT
First seen: 23 Jul 2026
Built for: developers and sysadmins managing email infrastructure
Model: Open source
Solves: Manually maintaining flattened SPF records in Route53 when including many authorized senders.

Registered as

PyPI: spf53

Developer

Hannahlyons

Index record

Indexed: 23 Jul 2026
Lifecycle: Alive
First seen: Jul 2026
Last seen: 23 Jul 2026

Identity audit (12)

Slug: spf53-pypi-org
Lifecycle last checked: 14 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 23 Jul 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
Category from: Recorded source: taxonomy-pass-b.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model from page content.
Canonical URL: https://pypi.org/project/spf53

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Also in Other infrastructure

Same category — not a similarity match