Outgoing authenticated SMTP server and email relay service (solves most SMTP and email relay errors).

June 7, 2021

Outgoing authenticated SMTP server and email relay service (solves most SMTP and email relay errors).

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  • Global Outgoing SMTP Email Service

    Delivering what is important to you

    Professional outgoing SMTP email service

    Instant setup – start sending email in minutes

    Responsive & dedicated support

    Flexible & scalable packages

  • Availability

    Robust & reliable network custom built for SMTP delivery

    High availability and redundancy

    Multiple Tier-1 network connections

    High performance but planet friendly hardware

    Round-the-clock remote monitoring with on-call engineers

  • Flexibility

    Everything you need from an SMTP Service

    Low cost starter accounts

    Flexible upgrade options

    Control panel management

    Responsive support

    …and much more!

  • Deliverability

    Over 15 years email delivery expertise

    Reputation monitoring

    High deliverability rates

    SPF / DKIM support

    Dedicated IP address options

    …and much more!

  • Security

    Send email with peace of mind

    SMTP authentication

    SSL / TLS SMTP encryption

    Strict sender address policy

    …and much more!

  • Customer Support

    Providing you with the support you need

    Responsive web & email support

    Online account management

    Extensive setup guides & knowledge base

    15+ years experience

    …and much more!


AuthSMTP is the outgoing SMTP email service for your e-commerce website, mailing list or email application on most current computers and mobile devices. With instant setup, a money back guarantee and very low cost starter accounts you can test and start sending email in minutes with no risk.


Our systems are custom designed / built for reliability and performance when processing and delivering very high volumes of email. We use high performance and redundant systems to help ensure we can provide the highest levels of availability.

Flexible Pricing

AuthSMTP accounts start from as little as $36 / £29 / €32 per year for up to 1000 messages per month and you can upgrade your account instantly via our Control Panel. For full details see our Pricing Calculator.

Responsive Support

We provide an online Control Panel plus email and web based support backed by knowledgable support staff on hand to provide help if required.


We have over 15 years experience providing email services and getting emails delivered quickly and accurately to your recipients.


We understand security is important to our customers – we provide a number of security features including SSL options when sending SMTP email.

Instant Setup

Accounts are created instantly when you sign up so with our setup guides you can start sending email within minutes.

What our customers think…