AuthSMTP
Outgoing SMTP email relay service for websites and applications.
AuthSMTP is an outgoing SMTP email relay service for sending mail from e-commerce websites, mailing lists, and email applications on computers and mobile devices. It provides authenticated SMTP servers that work with programs capable of connecting to an SMTP server with a username and password, addressing the need for reliable outbound delivery across different internet connections while managing sender reputation and deliverability.
Features include SSL/TLS SMTP encryption, SPF and DKIM support, strict sender address validation, virus scanning, multiple concurrent connections, alternative SMTP ports, a 50MB maximum email size, and shared or dedicated IP address options. Accounts are managed through an online control panel, with setup guides, a knowledge base, troubleshooting resources, and spam complaint and bounce reporting available for support.
AuthSMTP is aimed at users ranging from sole traders and small businesses to larger organizations with high-volume sending needs. Accounts are annual and tiered by monthly message allowance, data allowance, and number of from addresses or domains, with dedicated IP addresses available on higher tiers subject to approval. Accounts are created instantly at signup, and a money back guarantee applies to new accounts under stated conditions.
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