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SPECIFICTION
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Mailchimp Transactional (formerly Mandrill)

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Spec score 8.8 #5 of 41 in Transactional email services

Spec sheet

Free plan
NoRead 20 Sep 2026 · mailchimp.com
Account requirement
A Mailchimp account is required for transactional messaging access and billing.Read 28 Sep 2026 · mailchimp.com
Automatic top-ups
Accounts can automatically purchase blocks at a predefined limit.Read 28 Sep 2026 · mailchimp.com
Billing unit
Email pricing uses blocks, with each block representing 25,000 emails.Read 28 Sep 2026 · mailchimp.com
Block exhaustion
Sending stops when the account runs out of purchased email blocks.Read 28 Sep 2026 · mailchimp.com
Company trademark
Mailchimp is a registered trademark of The Rocket Science Group.Read 28 Sep 2026 · mailchimp.com
Customer support
Mailchimp customers can contact the support team; new customers can contact sales.Read 28 Sep 2026 · mailchimp.com
Dedicated IP
A dedicated IP is available as an optional $29.95 monthly add-on.Read 28 Sep 2026 · mailchimp.com
Dedicated IP option
YesRead 20 Sep 2026 · mailchimp.com
Delivery log retention
30Read 20 Sep 2026 · mailchimp.com
Delivery methods
bothRead 20 Sep 2026 · mailchimp.com
Developer resources
It provides SDK repositories, guides, and a first-party MCP server.Read 28 Sep 2026 · mailchimp.com
Event webhooks
YesRead 20 Sep 2026 · mailchimp.com
Free trial limit
New users can send up to 500 free emails to a verified domain.Read 28 Sep 2026 · mailchimp.com
Inbound email
Inbound email can be received, processed, and parsed through the service.Read 28 Sep 2026 · mailchimp.com
Marketing plan access
Transactional Email is an add-on to Standard, Premium, or legacy Monthly plans.Read 28 Sep 2026 · mailchimp.com
Monthly send limit
25000Read 20 Sep 2026 · mailchimp.com
Reporting tools
Reporting tools track delivery rates, recipient engagement, and account reputation changes.Read 28 Sep 2026 · mailchimp.com
Template editing
Templates support drag-and-drop editing and testing for marketer-developer collaboration.Read 28 Sep 2026 · mailchimp.com
Template options
bothRead 20 Sep 2026 · mailchimp.com
Transactional email
Sends targeted and event-driven messages through API or SMTP.Read 28 Sep 2026 · mailchimp.com
Transactional SMS
Sends critical SMS through the API using a Mailchimp SMS sending number.Read 28 Sep 2026 · mailchimp.com
Unused email policy
Unused emails do not roll over month to month.Read 28 Sep 2026 · mailchimp.com

Plans and prices

1–20 blocks $20 a month billed monthly 25,000 emails per block · 1–500,000 emails per month · 1–20 blocks Read 20 Sep 2026 · mailchimp.com
21–40 blocks $18 a month billed monthly 25,000 emails per block · 500,000–1,000,000 emails per month · 21–40 blocks Read 20 Sep 2026 · mailchimp.com
41–80 blocks $16 a month billed monthly 25,000 emails per block · 1,000,000–2,000,000 emails per month · 41–80 blocks Read 20 Sep 2026 · mailchimp.com
81–120 blocks $14 a month billed monthly 25,000 emails per block · 2,000,000–3,000,000 emails per month · 81–120 blocks Read 20 Sep 2026 · mailchimp.com
121–160 blocks $12 a month billed monthly 25,000 emails per block · 3,000,000–4,000,000 emails per month · 121–160 blocks Read 20 Sep 2026 · mailchimp.com
161+ blocks $10 a month billed monthly 25,000 emails per block · 4,000,000+ emails per month · 161+ blocks 4M+ emails; each block contains 25,000 emails Read 28 Sep 2026 · mailchimp.com
Free trial Free New transactional users; up to 500 free email sends to a verified domain Read 28 Sep 2026 · mailchimp.com
121-160 blocks $12 a month $12 per block 3M to 4M emails; each block contains 25,000 emails Read 28 Sep 2026 · mailchimp.com
81-120 blocks $14 a month $14 per block 2M to 3M emails; each block contains 25,000 emails Read 28 Sep 2026 · mailchimp.com
41-80 blocks $16 a month $16 per block 1M to 2M emails; each block contains 25,000 emails Read 28 Sep 2026 · mailchimp.com
21-40 blocks $18 a month $18 per block 500k to 1M emails; each block contains 25,000 emails Read 28 Sep 2026 · mailchimp.com
1-20 blocks $20 a month $20 per block 1 to 500k emails; each block contains 25,000 emails Read 28 Sep 2026 · mailchimp.com

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