Postwacht vs. MxToolbox: what is free and where the paid plans win
MxToolbox is the best-known collection of tools for DNS, blocklists and email delivery. Postwacht is a young, smaller service that analyzes test emails and monitors your domain. Here is what both do for free, where MxToolbox offers much more and when Postwacht is enough. As of 1 November 2026.
Comparison at a glance
| Postwacht | MxToolbox | |
|---|---|---|
| Single tests and tools | Test email with fix plan, SPF, DKIM, DMARC and blocklist checks, header analysis | very large collection of lookups for DNS, mail servers and blocklists |
| Free monitoring | up to 50 domains, daily, with email and chat alerts | 1 domain, blocklist monitoring weekly |
| Blocklists checked | the most important lists for domain and IP | over 100 according to the provider |
| Analyze DMARC reports | free with an account, with a rollout assistant | in the paid plans (Delivery Center) |
| Inbox placement test | free with an account, at test mailboxes | in the paid plans, 30 or 100 analyses a month |
| BIMI, SPF flattening, brand protection | not available | in the paid plans |
| Paid plan prices | none, all features currently free | USD 129 (Delivery Center) and USD 399 (Delivery Center Plus) a month |
| Language, data location | German and English, servers in Germany | English |
MxToolbox details according to the provider's product page, retrieved on 1 November 2026. Plans and prices change; check them there. “The most important lists” at Postwacht means: fewer than MxToolbox.
Where MxToolbox is stronger
- Breadth and age. MxToolbox has been around for over 20 years and checks over 100 blocklists by its own account. Postwacht is a few weeks old and covers less.
- Features for large senders. The paid plans offer BIMI management, SPF flattening, protection against impersonation, complaint reports and mail flow monitoring. Postwacht has none of that.
- Support. MxToolbox offers onboarding help and managed services. Postwacht is a small project with support via a form.
Where Postwacht is stronger
- More for free. Free monitoring covers up to 50 domains daily, plus DMARC analysis, chat alerts and the inbox test. At MxToolbox these features are reserved for paid plans or limited to one domain.
- Fix plan. For every finding: why it matters, what to do and the ready DNS record, with instructions for German providers such as IONOS, STRATO and Hetzner.
- DMARC rollout in four steps, with a recommendation from your reports on when quarantine and
rejectare safe. - German, servers in Germany, prices in euros with an invoice.
Which one fits you?
Choose MxToolbox if you send large volumes, need BIMI or managed services, or want to query very many blocklists.
Choose Postwacht if you are a small business, agency or freelancer who wants to watch domains for free, introduce DMARC safely and get concrete instructions for fixing problems.
Many people use both: MxToolbox for single lookups, Postwacht for ongoing monitoring. Try it with a test on the home page.
Frequently asked questions
Does Postwacht replace MxToolbox?
For small senders' everyday needs often yes; for large senders with BIMI, brand protection or complaint reports, no. We are smaller and don't want to claim otherwise.
How many blocklists does Postwacht check?
The most important ones for domain and IP; the exact number is shown in the test result. It is fewer than MxToolbox.
Is the information current?
It comes from the provider's product page of 1 November 2026. If you spot a mistake, write to us via support and we will correct it.