Email¶

28 free Email APIs — auth type, HTTPS and CORS support for each, so you can pick the right one without opening every docs page.

API	Description	Auth	HTTPS	CORS
mailboxlayer	Email address validation	`apiKey`	Yes	Unknown
AGPC Domain Check	Check a domain's SPF, DKIM, DMARC and MX with a graded shareable report	No	Yes	Yes
Atomic Mail	Email for AI agents: programmatic inbox creation and send/receive over JMAP	`apiKey`	Yes	Unknown
Best Temp Mail	Disposable inboxes for automated email testing, with OTP extraction	No	Yes	No
Cloudmersive Validate	Validate email addresses, phone numbers, VAT numbers and domain names	`apiKey`	Yes	Yes
Disify	Validate and detect disposable and temporary email addresses	No	Yes	Yes
DropMail	GraphQL API for creating and managing ephemeral e-mail inboxes	No	Yes	Unknown
EmailJS	Send emails directly from client-side JavaScript without a backend server	`apiKey`	Yes	Yes
Email Validation	Validate email addresses for deliverability and spam	`apiKey`	Yes	Yes
Email Validator by LifeStep	Validate email syntax and MX, detect disposable/role addresses, suggest typo fixes	No	Yes	Yes
EVA	Validate email addresses	No	Yes	Yes
Guerrilla Mail	Disposable temporary Email addresses	No	Yes	Unknown
ImprovMX	API for free email forwarding service	`apiKey`	Yes	Unknown
inboxsink	Disposable inboxes for end-to-end tests that wait for the email and extract OTP codes	`apiKey`	Yes	No
Kickbox	Email verification API	No	Yes	Yes
Kiprio Email Validate	Free email validation: MX check, disposable detection, syntax	`apiKey`	Yes	Yes
mail.gw	10 Minute Mail	No	Yes	Yes
mail.tm	Temporary Email Service	No	Yes	Yes
MailboxValidator	Validate email address to improve deliverability	`apiKey`	Yes	Unknown
MailCheck.ai	Prevent users to sign up with temporary email addresses	No	Yes	Unknown
Mailtrap	Email API and SMTP for sending transactional and bulk emails, with email testing sandbox for safe development	apiKey	Yes	Unknown
PostStack	EU-hosted email API for transactional and marketing email, with contacts, broadcasts, and analytics	`apiKey`	Yes	No
RankFabrik Verify	Validate email addresses for deliverability, syntax and disposable detection	`apiKey`	Yes	Unknown
Sendgrid	A cloud-based SMTP provider that allows you to send emails without having to maintain email servers	`apiKey`	Yes	Unknown
Sendinblue	A service that provides solutions relating to marketing and/or transactional email and/or SMS	`apiKey`	Yes	Unknown
SMTPfast	Send transactional email, manage contacts and broadcasts, free 3,000 emails/month	`apiKey`	Yes	Yes
uchecker	Bulk email verification with full SMTP server responses	`apiKey`	Yes	Unknown
Verifier	Verifies that a given email is real	`apiKey`	Yes	Yes

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