01
We notice
Bounces or complaints climb. Our health check opens a review. Your account stays as it was.
Within 15 minutes
Email API for developers
Send transactional email with one API call. If something looks wrong, we review before we block, tell you why, and give you 72 hours to reply.
Starter is free, no card
No domain cap
A reason for every block
202 Accepted { "id": "em_8f2c…", "status": "queued" }0 ms
queued+0 ms
sent+180 ms
delivered+1.4 s
webhooksigned
Amazon SES deliveryNo domain capSMTP on 465 and 587Signed webhooksIdempotency keysBatch up to 100Plain-English bouncesCursor paginationNo seat charges72-hour appeals
The fair-review promise
No surprise bans. Ever.
An alarm opens a review, never a block. A person looks, writes down the reason, and you get time to answer.
UsualSuspended overnight. A form reply. No date to fix it by.
OursReview first, written reason, 72 hours, refund if we part ways.
02
A person looks, you keep sending
Someone on our team reads the numbers. Your email keeps flowing while we look.
Within 24 hours03
We explain in writing
If something must change, you get the reason, the figures behind it and what would fix it.
Always a written reason04
You get 72 hours
Reply, fix the list, or appeal. Nothing closes before the clock runs out.
72 hours, every time05
Refund if we close
If we do part ways, unused prepaid time comes back to your card. No argument.
Within 5 business days
Deliverability coach
Land in the inbox, and know why.
Most email problems are fixable before anyone gets blocked. The coach checks your setup, your content and your pace, and says what to do in plain words.
Check an email
Try it. Type a subject line.
The same kind of checks the dashboard runs before you send. Ours, said openly, and no promise about any inbox.
Likely to land in spam
DNS and DMARC
Every record, checked and explained.
- DKIM
3 keysVerified - SPF
send.acme.comVerified - Bounce MXVerified
- DMARC
p=noneTip
DMARC is only watching. Move to p=quarantine once reports look clean.
Bounces in plain words
Not a code. A reason and a next step.
550 5.1.1 <sam@exmaple.com>: Recipient address rejected: User unknown
5.1.1Bounced for good
This mailbox does not exist at that domain. We have stopped sending to it, so it cannot hurt your reputation.
Warm-up plan
A pace for a new domain, from 50 a day to 50,000.
Advice, never a hidden limit. Go over and the coach tells you; your email still sends.
The dashboard
Every email, every step, in one log.
Queued, sent, delivered, opened, bounced. Search, filter, replay a webhook, or ask the coach what went wrong.
Example dashboard with sample data
For developers
The boring parts, done properly.
One REST API and an SMTP relay. Everything you would otherwise build around them is already here.
Webhooks
Signed events, retried until you answer.
Standard Webhooks signatures, eight retries, and a replay button for every delivery. Private and internal addresses are refused.
webhook-signature: v1,K5oZfzN95Z9UVu1EsfQmfVNQhnkZ2pj9o9NDN/H/pI4=
SMTP relay
Any app that speaks SMTP.
# same rules, limits and log as the API
host smtp.mailcandor.com
port 465 (TLS) or 587 (STARTTLS)
user mailcandor
pass mc_live_…
Idempotency
Send twice, deliver once.
Idempotency-Key: order-1042-receipt
# a retried request returns the
# first response, not a second email
Batch
A hundred emails, one call.
100per request
Rate limits
Limits you can read.
ratelimit-limit: 10
ratelimit-remaining: 9
ratelimit-reset: 1
Teams
Invite everyone. No seat charges.
Admins manage keys, domains and webhooks. Members see the log.
Pricing
Pay for what you send. We pick the cheaper plan.
No monthly floor, no domain cap, no daily limit. Prices in US dollars.
50,000emails
01,0001M
Pay as you goFirst 3,000 free, then $0.50 per 1,000
$23.50Team$39 with 100,000 included
$39.00You payPay as you go is cheaper here
$23.50Starter
For side projects and testing
$0 / month
3,000 emails a month
- No daily cap
- 3 domains
- 30 days of logs
- No card needed
Most teams start here
Pay as you go
For apps that are growing
$0 / month
First 3,000 free, then $0.50 per 1,000
- Unlimited domains
- 30 days of logs
- 10 requests a second
- Never stops at a limit
Team
For teams sending at volume
$39 / month
100,000 included, then $0.40 per 1,000
- Unlimited domains
- 90 days of logs
- 50 requests a second
- Dedicated IP, $25 a month
You never pay more than the cheapest plan for your month. Above 81,000 emails, Team costs less than Pay as you go, so we bill the Team price without you switching. Changed plan during a month? That month's emails are billed at the paid plan you used, and the Team fee only for the days you were on Team.
Cancel in one clickFrom Settings. No email, no call.
Warned at 80%We email you before you reach your included emails.
No seat chargesInvite the whole team.
Refunds if we close youUnused prepaid time, back within 5 business days.
Questions
Straight answers.
What happens if my bounce rate spikes?
We open a review and keep sending while a person looks. If something has to change, you get the reason in writing and 72 hours to reply or appeal before anything closes.
Do you charge per domain or per seat?
No. Pay as you go and Team have unlimited domains, and every plan lets you invite the whole team for free.
Who actually delivers the email?
Amazon SES. We add the review process, the coach, the log, webhooks, the relay and the billing on top.
Can I use SMTP instead of the API?
Yes. Point any SMTP client at smtp.mailcandor.com on port 465 or 587 with an API key as the password. It follows the same rules and shows up in the same log.
Can I send before my domain is verified?
New teams start in a sandbox: you can send to people on your own team. Verify a domain and you can send to anyone.
How do I cancel?
One click in Settings. Monthly plans stop at once; yearly plans stop renewing. If we ever close your account, unused prepaid time is refunded within 5 business days.
Starter is free
Send your first email today.
One API key, one verified domain, one call. If anything ever looks wrong, you will hear from a person first.