Prolateral Consulting Ltd
Prolateral Consulting Ltd
SMTP SmartHost
Mail Relay
outgoing SMTP

Prolateral offers primary and backup domain (DNS) services, with servers in key geographic locations providing the best service possible.

Outgoing SMTP Email Services for Bulk Mailers

outMail is an outgoing SMTP email server and mail relay service for use with email distribution software, including bulk mailers, mailing lists and news letters.  outMail is not a spamming service and we operate a strict acceptable use policy.

Send emails from your Internet connection using any email address or your domain name

Some Internet service providers will only let you send emails from their own email addresses or charge you a premium for using your own domain name.  With outMail you can send emails from your own domain name and other email address.  outMail also supports alternative TCP/IP ports for SMTP (typically SMTP port 25) incase your ISP is blocking the port.

Avoid your emails being blacklisted

Some ISPs outgoing mail servers may become blacklisted.  We have a strict acceptable user policy and we constantly monitor our systems and third party blacklists to help ensure our servers remain unlisted. We ask all customers to ensure their mailing lists are updated regularly, contain opted in addresses only and that you have a mechanism to process bounces and opt outs.

Support for all major SMTP bulk senders

  • Mach5 Mailer
  • SendBlaster
  • OpenEMM
  • Interspire Email Marketer
  • Mautic
  • SugarCRM & SuiteCRM
  • Microsoft Dynamics
  • Salesforce
  • PHP Mailer
  • and many more.


  • Instant account creation - start sending emails instantly after signing up.
  • Send emails from any address - no limit on send from email addresses or domains.
  • Mail Relay Outbound Service - SMTP Authenticated Internet Mail Relay.
  • Standard SMTP ports - SMTP port 25 supported.
  • Alternative SMTP ports - additional SMTP TCP ports available to void your ISP blocking standard SMTP port.
  • Sending API - send emails using a RESTful API instead of SMTP.
  • SMTP Based Authentication - allows sending emails securely via authentication.
  • Daily quota limits - based on package.
  • Flexible quota burst - allowing for the days you need to exceed your quota (Quota explained here).
  • Reports - Online reports with exporting tools.


Choose the best package that suites your requirements.

Package Plan

Daily message limit

Cost per month


Outmail 10


£0.00 (FREE)

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Outmail 100



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Outmail 200



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Outmail 300



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Outmail 500



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Outmail 1000



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Outmail 2000



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Outmail 10000



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Prices exclude VAT

The table above shows the different outMail packages that are available based on the number of emails you need to send.


Complete how to guides with step-by-step instructions on how to configure your client mail application are here



Sending emails with my iPhone was easy until I connected to my WiFi at home and my ISP forces me to change the SMTP settings to them.

With outMail I have just one SMTP server regardless of location.

Carol Green, Luton, Beds