Who this comparison is for
MailBridge highlights
- Unified IMAP sync + workspace logging of all mail
- Templates + drafts + attachments with bulk enqueue
Mailgun highlights
- Routes & inbound parse webhooks
- Deliverability tooling and domain auth helpers
Capability matrix
| Capability | MailBridge | Mailgun | Notes |
|---|---|---|---|
| Unified inbox (IMAP folders, labels, moves) | Full | None | — |
| Drafts, templates, attachments | Full | Partial | Send-side templates only |
| Programmatic send (secure bridge) | Full | Full | HMAC Bridge vs REST |
| Inbound processing | Native | via_webhook | IMAP ingestion vs HTTP routes |
| Bulk queued sender | Full | Partial | Mailgun has campaigns via separate features |
| Verification cache & freshness windows | Full | Partial | Different scope (sending domains vs MX/SMTP probes) |
| Event bus integration | Native | via_webhook | — |
| .eml file import/preview | Full | None | — |
- If only an outbound API is required, Mailgun is a strong fit. MailBridge adds inbox + operational UX.
Total cost of ownership
MailBridge reduces context switching where teams must triage inbound and manage outbound in one place. Mailgun remains efficient for pure API-sending workloads.
Assumptions
- Multiple IMAP accounts + internal apps calling Bridge
Migration plan
From Mailgun · Parallel run → switch REST calls to Bridge → deprecate routes
-
1
Connect inboxes (OAuth or IMAP/SMTP) and run initial sync
-
2
Map senders/templates; upload drafts if needed
-
3
Replace POST to Mailgun with Bridge /compose.send calls
-
4
Verify bounce parity and cut over DNS if applicable
Security
- Scopes + IP allowlists per Bridge connection
- Replay-window HMAC signatures
Evidence & sources
| Claim | Value | Source |
|---|---|---|
| Event topics | Email.received/sent/bounced |
product_docs
Published on workspace bus
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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.