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Email Spam Tester API alternatives

12 other email APIs compared on authentication, HTTPS, CORS and documented endpoints.

APIAuthHTTPSCORSEndpoints
Email Spam TesterNo authYesYes—
SendgridAPI keyYesUnknown334
SendinblueAPI keyYesYes—
mail.tmNo authYesYes—
MandrillNo authYesUnknown90
Guerrilla MailNo authYesUnknown—
Postmark Account-level APINo authYesUnknown23
ImprovMXAPI keyYesUnknown—
MailtrapAPI keyYesUnknown—
Postmark APINo authYesUnknown43
DropMailNo authYesUnknown—
KickboxNo authYesYes—
Email ValidationAPI keyYesYes—

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