Alternatives

Products that do what Free SMTP Tester - Get Your Spam Score does

Test SMTP, SPF, DKIM, DMARC & spam score. No signup.

1
MailTested▲7
Check why your emails go to spam — instantly.
Nov 2025
2
SMTP‑Test.com▲103
One‑click SMTP server test with real‑time protocol logs
2025
3
SMTP Debug Tool▲346
Test and debug your SMTP connection, quickly and for free
2023
4
MailTest▲7
Most tools say DKIM failed. MailTest tells you why
Apr 2026
5
Mail Tester▲307
Test the spamminess of your email
2016
6AF
A fake SMTP server for software integration testing▲127
This is a side project of mine. Use this as your SMTP server in a test environment to guarantee that your users don't receive test emails. Looking for feedback, especially on the security side.
2024 · fakemail.stream
7
Email Inspect▲9
Free dmarc, spf & dkim analyzer tools
Nov 2025
8
Email Deliverability API & Checker▲2
Instantly audit SPF, DKIM & DMARC to stop landing in spam.
27d ago · web-production-80c77.up.railway.app
9
InboxGreen▲1
Free email deliverability checker for SPF, DKIM & DMARC
May 2026 · inboxgreen.email
10
Email Deliverability Toolkit▲9
9 free tools to keep your email out of spam
10d ago · truelist.io
11
DMARC Digests▲101
Protect your brand from email scammers.
2020
12ST
SMTP Tunnel – A SOCKS5 proxy disguised as email traffic to bypass DPI▲140
A fast SOCKS5 proxy that tunnels your traffic through what looks like normal SMTP email, bypassing Deep Packet Inspection firewalls. How it works: - Client runs a local SOCKS5 proxy (127.0.0.1:1080) - Traffic is sent to server disguised as SMTP (EHLO, STARTTLS, AUTH) - DPI sees legitimate email session, not a VPN/proxy Features: - One-liner install on any Linux VPS - Multi-user with per-user secrets and IP whitelists - Auto-generated client packages (just double-click to run) - Auto-reconnect on connection loss - Works with any app that supports SOCKS5 Tech: Python/asyncio, TLS…
Jan 2026 · github.com
13
Email Verifier▲50
Verify your email list before you hit send
Aug 2026 · mailercloud.com
14
Lume Free Email Tools
Free SPF/DKIM checker, blacklist scanner & header analyzer
Mar 2026 · lumesend.com
15VT
VaultSandbox – Test your real MailGun/SES/etc. integration▲58
I've spent the last few months working on something I wish I'd had years ago. I kept running into the same issue: CI green, production mail broken. TLS handshake failures, DKIM alignment mismatches, SPF soft-fails ... the stuff that only surfaces when real mail servers are involved. Most test tools (Mailpit, MailHog) are catch-alls. They confirm "an email was sent" but don't validate the protocol. They also aren't designed for network-exposed environments: no auth, unprotected Web UI, easy to enumerate messages. VaultSandbox is my attempt at fixing that. It's a self-hosted SMTP gateway…
Jan 2026 · vaultsandbox.com
16
smtp-probe▲2
Go CLI for email deliverability diagnostics
Jul 2026 · github.com
17
Protecta360 - Domain Spoof Test▲1
Check DMARC, SPF and DKIM in DNS Settings
30d ago · protecta360.com
18
CheckEmailDelivery
Email deliverability audit + AI writer. Free. 60 seconds.
Mar 2026 · checkemaildelivery.com
19
Email Posture▲5
Get alerted the moment your DMARC, SPF, or DKIM breaks
Jul 2026 · emailposture.com
20
Email DNS Check
Diagnose SPF, DKIM and DMARC errors instantly
Mar 2026
21
DmarcBeacon▲3
Stop your emails from going to spam.
Feb 2026 · dmarcbeacon.com
22
DKIM.pro▲3
Monitor SPF, DKIM and DMARC before email breaks
May 2026 · dkim.pro
23
MailMedic ‑ Email Health▲1
Scan your domain's SPF, DKIM and DMARC in seconds
6d ago · apps.shopify.com
24
EmailGuard▲4
Find out why your emails go to spam
Jun 2026 · fixemailsetup.com

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