Postbox Consultancy Services alternatives
Tools that do what Postbox Consultancy Services does, found by what they say they do rather than by shelf. Among the equally alike, the most used come first. Each line says how it differs from Postbox Consultancy Services.
Read 2026-10-19
With a free plan or free to use: GlockApps, SenderSignal, Cobytes, mailX by mailwarm, MailVakt, Jotform, BlackVeil.
- #1
GlockAppsMarketingMCP · sign-in
Tests where your emails land in Gmail, Outlook and Yahoo inboxes versus spam folders, and checks SPF, DKIM, DMARC and blocklist status.
Free plan
8.7kActiveFrom $59/mo - #2
SenderSignalDeveloper tools
Provisions a dedicated sending server, writes SPF, DKIM and DMARC records into your DNS, then ramps volume while monitoring blacklists and inbox placement.
Free planMore widely used
67ActiveFrom $49/mo - #3
CobytesSecurityMCP · open
Scans a domain's DNS, email authentication and web security records, reporting failing checks with readable fix guidance.
Free plan
97MaintainedFree2024 - #4
mailX by mailwarmMCP · open
Analyzes DNS records, email authentication, and deliverability issues to diagnose why emails land in spam.
Free planAlso: Analytics, Compliance
546ActiveFree - #5
MailVaktMCP · open
Reads a domain's public SPF, DKIM, DMARC and MX settings and returns the DNS records needed to fix errors.
Free plan
Little sign of useActive - #6
PowerlineProductivityMCP · open
Renders HTML emails in real mail clients as pixel screenshots and checks domain SPF, DKIM, DMARC and blacklists via API.
Same job
106Active - #7
PalisadeSecurityMCP · sign-in
Reads DMARC aggregate reports, flags SPF and DKIM failures per sender, and writes approved DNS record fixes into your zone.
Also: Workflow automation
3.4kActiveFrom $19/mo - #8
JotformProductivityMCP · sign-in
Builds online forms with drag-and-drop interface, collects submissions, and integrates with business apps.
Free planAlso: Workflow automation
1.7MActiveFree plan2006 - #9
BlackVeil
Scans a domain's public DNS records for email authentication, transport, DNS integrity and exposure checks, reporting what each found.
Free plan
350From $29/mo - #10
AerosendProductivityMCP · sign-in
Provides warmed, isolated sending inboxes on dedicated servers, and alerts when domains' reply or bounce rates start dropping.
Same job
134ActiveFrom $4/mo2024
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How this list is made: the words Postbox Consultancy Services is described with (what it does, for whom, what it is used for) are matched against every tool in the Atlas. A tool on the same shelf, or doing the same kind of work, counts for a little more. Nothing here is paid for.