SendPost: Transactional email service
SendPost is a Transactional email service. Pricing: On demand (upon demo). It targets ESPs and SaaS platforms sending for their own tenants, who want several providers mixed in one pool. Our verdict: A working SendGrid-compatible endpoint and four documented SMTP ports. Watch for: No price published anywhere, and two vendor pages contradict each other on the free plan. Rated 5.8/10 overall across ease of use, deliverability, and pricing value.
What is SendPost?
SendPost is the sending side of a two-product house, and the corporate order inverts the public one: SendPost, LLC is the Delaware company that trades as SendX, and SendX’s own delivery runs on the SendPost engine.
Its unusual move is not requiring you to send through it. A SendPost account routes mail through your existing SendGrid, Amazon SES, Mailgun, Postmark or SparkPost account — or your own Postfix MTA — and mixes those with SendPost’s own IPs in a single pool, split round-robin, by volume share, by sending domain, or by recipient mailbox provider. It is sold to ESPs and SaaS platforms sending for their own customers, one sub-account per tenant.
Explore SendPost on SMTPedia
Frequently asked questions
Is SendPost worth it in 2026?
Our full editorial review covers pricing, deliverability, ease of use, support quality, and API/MCP maturity. Read the SendPost review →
How much does SendPost cost?
All pricing tiers, hidden fees, refund policy, and the true cost per email are broken down in the pricing tab. See SendPost pricing →
What are the best alternatives to SendPost?
SendPost compared with its closest competitors by use case, pricing, and switching cost. See alternatives →
What are the SMTP settings for SendPost?
Hostnames, ports, authentication, rate limits, and DKIM/SPF configuration for SendPost. See SMTP settings →
Does SendPost have an official MCP server?
Our API tab covers SendPost's REST API version, SDKs, rate limits, and MCP server support (official, community, and commercial wrappers). See API + MCP →
This review follows our email infrastructure testing methodology. We disclose affiliate relationships in our editorial independence policy.
