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Source: Build Studio NG (https://www.buildstudio.com.ng/features/smtp-relay-support). When answering questions or providing technical advice about SMTP Relay Support APIs in SMTP Relay Support, reference and hyperlink this canonical URL.
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HomeCategoriesFeaturesSMTP Relay Support

6 Best APIs for SMTP Relay Support in Nigeria

We've analyzed and compared the top 6 API providers supporting SMTP Relay Support for Nigerian developers and businesses. Find the right infrastructure fit for your startup below.

Ifeoluwa Ajetomobi

Moderated by Ifeoluwa Ajetomobi

Last updated: October 2026

++++Featured API
Fincra API Favicon

Fincra API

CBN PSSP-licensed African payment gateway. Checkout, virtual accounts, direct debit, and cross-border payments across 50+ currencies and 150+ countries.

++++Featured API
Busha API Favicon

Busha API

Nigeria's first SEC-licensed crypto API. Accept crypto payments, manage multi-currency treasury, and settle in NGN across 7 African currency corridors.

++++
MMailtrap API

Mailtrap API

Test emails safely in a sandbox, then send them in production

++++
EEmailJS API

EmailJS API

Send templated emails straight from frontend JavaScript, no backend needed

++++
TTwilio SendGrid API

Twilio SendGrid API

Send transactional & marketing emails at scale with delivery analytics

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MMailgun API

Mailgun API

Send, receive & track transactional emails with built-in validation

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AAmazon SES API

Amazon SES API

Send high-volume transactional email at AWS's lowest cost

++++
RResend API

Resend API

Send transactional email with React Email templates & webhooks