Who this comparison is for
MailBridge highlights
- Inbox + Drafts + Bulk + HMAC Bridge in one app
Postmark highlights
- Excellent deliverability & message streams
Capability matrix
| Capability | MailBridge | Postmark | Notes |
|---|---|---|---|
| IMAP inbox sync | Full | None | — |
| Programmatic send | Full | Full | — |
| Templates & drafts (with attachments) | Full | Partial | Templates yes; inbox-backed drafts no |
| Bulk sender / campaigns | Full | Partial | Limited marketing scope; focus on transactional |
| Bounces/DSN into event bus | Full | Full | Different transport (webhooks vs internal bus) |
| HMAC Bridge with rotation & allowlists | Native | None | API tokens vs signed bridge |
| .eml import/preview | Full | None | — |
- If you only need send APIs and webhooks, Postmark is a great fit. MailBridge covers the inbox and operational UX.
Total cost of ownership
MailBridge can reduce tooling sprawl where inbox visibility matters. Postmark excels for pure transactional workloads with strict deliverability SLAs.
Assumptions
- Inbox triage + product-triggered emails in one workspace
Migration plan
From Postmark · Template parity → Bridge swap → inbox sync enablement
-
1
Port templates; verify variables
-
2
Switch send to Bridge API with HMAC
-
3
Enable IMAP sync and logging for reply handling
Security
- KMS-managed keys; rotation + audit
Evidence & sources
| Claim | Value | Source |
|---|---|---|
| Verification cache | GOOD/RISKY/BAD/TEMP/UNKNOWN classes |
product_docs
Freshness windows
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About MailBridge
MailBridge centralizes business email inside your Velaxe workspace. Connect IMAP/SMTP accounts (including OAuth providers) and the background poller ingests folders, flags, bodies, and attachments with safe throttles. Compose drafts with uploads, send immediately, or enqueue to the bulk sender with pacing and retry policies.
A hardened, timestamped HMAC bridge lets external apps request account suggestions or send mail via signed requests—no CORS headaches. Connections include scopes, IP allowlists, and rotating secrets with audit logs and analytics.
Verification tools probe domains/MX/SMTP and cache outcomes to reduce bounces. Events integrate with workflows and AI responses so teams can automate follow-ups and logging into CRM/Chronicle.