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Is Resend SMTP down?

Resend SMTP is up

Right now

No. Resend SMTP: no incidents reported.

Last checked (2026-10-10 07:19 UTC) from resend-status.com · every 120s

For agents

proceed

Proceed.

GET upbutler.com/status/resend/smtp/status.agent.json

MCP: upstream_status {"service":"resend","component":"smtp"}

SMTP relay.

Part of Resend status.

What Resend says

Operational

Taken as is from Resend's own status page API. Incident titles and component names below are theirs. Narrowed to what concerns Resend SMTP.

Open resend-status.com

What UpButler measured

API edge is answeringHTTP 401 · 184 ms

One request without credentials to api.resend.com every two minutes, from eu-central (one location, not a global view). An answer (the expected "not authenticated") shows the edge, TLS and routing work. It does not prove that authenticated calls succeed. The probe is for Resend as a whole, not for Resend SMTP specifically.

Checked · up since 2026-10-10 01:23 UTC

Resend SMTP: what Resend lists

1 operational

  • SMTPOperational

Resend SMTP incidents, last 90 days

  1. 2026-07-13: no record
  2. 2026-07-14: no record
  3. 2026-07-15: no record
  4. 2026-07-16: no record
  5. 2026-07-17: no record
  6. 2026-07-18: no record
  7. 2026-07-19: no record
  8. 2026-07-20: no record
  9. 2026-07-21: no record
  10. 2026-07-22: no record
  11. 2026-07-23: no record
  12. 2026-07-24: no record
  13. 2026-07-25: no record
  14. 2026-07-26: no record
  15. 2026-07-27: no record
  16. 2026-07-28: no record
  17. 2026-07-29: no record
  18. 2026-07-30: no record
  19. 2026-07-31: no record
  20. 2026-08-01: no record
  21. 2026-08-02: no record
  22. 2026-08-03: no record
  23. 2026-08-04: no record
  24. 2026-08-05: no record
  25. 2026-08-06: no record
  26. 2026-08-07: no record
  27. 2026-08-08: no record
  28. 2026-08-09: no record
  29. 2026-08-10: no record
  30. 2026-08-11: no record
  31. 2026-08-12: no record
  32. 2026-08-13: no record
  33. 2026-08-14: no record
  34. 2026-08-15: no record
  35. 2026-08-16: no record
  36. 2026-08-17: no record
  37. 2026-08-18: no record
  38. 2026-08-19: no record
  39. 2026-08-20: no record
  40. 2026-08-21: no record
  41. 2026-08-22: no record
  42. 2026-08-23: no record
  43. 2026-08-24: no record
  44. 2026-08-25: no record
  45. 2026-08-26: no record
  46. 2026-08-27: no record
  47. 2026-08-28: no record
  48. 2026-08-29: no record
  49. 2026-08-30: no record
  50. 2026-08-31: no record
  51. 2026-09-01: no record
  52. 2026-09-02: no record
  53. 2026-09-03: no record
  54. 2026-09-04: no record
  55. 2026-09-05: no record
  56. 2026-09-06: no record
  57. 2026-09-07: no record
  58. 2026-09-08: no record
  59. 2026-09-09: no record
  60. 2026-09-10: no record
  61. 2026-09-11: no record
  62. 2026-09-12: no record
  63. 2026-09-13: no record
  64. 2026-09-14: no record
  65. 2026-09-15: no record
  66. 2026-09-16: no record
  67. 2026-09-17: no record
  68. 2026-09-18: no record
  69. 2026-09-19: no record
  70. 2026-09-20: no record
  71. 2026-09-21: no record
  72. 2026-09-22: no record
  73. 2026-09-23: no record
  74. 2026-09-24: no record
  75. 2026-09-25: no record
  76. 2026-09-26: no record
  77. 2026-09-27: no record
  78. 2026-09-28: no record
  79. 2026-09-29: no record
  80. 2026-09-30: no record
  81. 2026-10-01: no record
  82. 2026-10-02: no record
  83. 2026-10-03: no record
  84. 2026-10-04: no record
  85. 2026-10-05: no record
  86. 2026-10-06: no record
  87. 2026-10-07: no record
  88. 2026-10-08: no record
  89. 2026-10-09: no record
  90. 2026-10-10: no incident reported
2026-07-130 of 1 days with an incidenttoday

Each bar is a day, coloured by the worst incident Resend reported for Resend SMTP. It is their incident record, not a measurement of uptime.

No finished incidents on record yet since 2026-10-10. UpButler keeps what Resend publishes for 90 days from the day it starts tracking a service.

Get alerted when Resend SMTP goes down

No account. One email when Resend reports an incident that affects Resend SMTP, one when it is over. You confirm the address first, and every email has a one-click unsubscribe.

Or follow the RSS feed. On UpButler? Add Resend as a dependency to route it to Slack, Teams or a webhook.

Status badge

Show Resend SMTP's current status in a README or an internal wiki. It updates by itself.

Resend SMTP status badge

[![Resend SMTP status](https://upbutler.com/status/resend/badge.svg?component=smtp)](https://upbutler.com/status/resend/smtp)

Tell your outage from Resend's

Declare that your project depends on Resend SMTP. When one of your monitors fails while Resend has an incident that began around the same time, UpButler tags your incident "likely upstream" with their incident linked, says so in the alert and the AI report, and tells your on-call agent not to change code.

npx upbutler init finds the dependency from your env var names and packages. The catalog, dependencies and upstream-aware incidents are on every plan, including Free.

Start freeHow it works
upbutler.yaml
# upbutler.yaml
dependencies:
  - service: resend
    components: ["SMTP"]
Ask before you retry
curl -s https://upbutler.com/status/resend/smtp/status.agent.json
status.agent.json (live)
{
  "schema": "upbutler.upstream-status/v1",
  "service": "resend",
  "component": {
    "slug": "smtp",
    "name": "Resend SMTP"
  },
  "verdict": "proceed",
  "status": "operational",
  "reason": "Resend SMTP: no incidents reported",
  "retryAfterSec": null,
  "incident": null,
  "probe": {
    "state": "up",
    "statusCode": 401
  }
}

Questions

Is Resend SMTP down right now?
No. As of 2026-10-10 07:19 UTC, Resend SMTP is up. This page reads the status again every 2 minutes.
Where does this status come from?
From Resend's own status page API at https://resend-status.com. UpButler reads it once for everyone (not once per visitor) every 2 minutes with conditional requests, and shows it unchanged: incident titles and component names are Resend's words. Their page covers more than this page shows; it is narrowed to the parts that concern Resend SMTP.
What does UpButler's own Resend check prove?
Every two minutes UpButler sends one request without credentials to the Resend API edge (api.resend.com) from eu-central. Any answer from the edge, usually HTTP 401, shows that DNS, TLS and routing work from there. It does not prove that authenticated requests succeed, and it is one location, not a global view. It is most useful when it fails before their status page changes; the page then says so.
Can I get an alert when Resend SMTP goes down?
Yes, without an account: enter your email on this page, confirm the link we send, and you get one email when Resend reports an incident that affects Resend SMTP and one when it is over. There is also an RSS feed at https://upbutler.com/status/resend/feed.rss. Teams on UpButler can route the same alert to Slack, Teams or a webhook.
How can my agent or app check Resend SMTP status?
Fetch https://upbutler.com/status/resend/smtp/status.agent.json: a small JSON document with a verdict (proceed, retry, fallback or pause) and retryAfterSec. No key is needed. The same answer is an MCP tool, upstream_status {"service":"resend","component":"smtp"}, on https://upbutler.com/mcp/public.
How do I know whether an outage is mine or Resend's?
Add "resend" to the dependencies of your UpButler workspace. When one of your monitors fails while Resend has an incident that began around the same time, your incident is tagged "likely upstream" with their incident linked, and your on-call agent is told not to change code.

Also check

UpButler is not affiliated with Resend. Status and incident text belong to Resend and are read from their public status source; the probe result is UpButler's own measurement.