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 SmartHost Services for SME and Business Users

outMail is an outgoing SMTP SmartHost and Email Relay service for use on your computer, laptop, server and portable devices in your business and/or home office.  It will allow you to send emails from any SMTP email client or server using your own email address and domain name(s).

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.  With outMail you can send emails from your own domain name and other email address.  outMail also supports alternative TCPIP 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. IP and sender reputation is extremely important to use so we can maintain a high deliverability of your emails.

Support for all major email applications and servers

  • Outlook, Outlook Express, Windows Mail, Windows Live Mail.
  • Thunderbird, Mozilla
  • eM Client
  • Apple Mac Mail.
  • Microsoft Small Business Server
  • Microsoft Exchange Server
  • Microsoft 365 Exchange
  • Mercury Mail
  • MDaemon
  • and many more.

As outMail is an authenticated SMTP service you can even use outMail on photocopiers that support SMTP Auth.


  • Instant account creation - start sending emails instantly after signing up.
  • Send emails from your desktop - Supports SMTP Email Applications.
  • Send emails from your server - Support for many Email Server Applications.
  • Send emails from your mobile - Supports Apple, Android and Windows Mobile.
  • Send emails from any address - no limit on send from email addresses or domains.
  • Send emails from any location - ideal for home, office, and mobile users and devices.
  • Send emails from Microsoft 365 Exchange - configure the Office365 Exchange Send Connector to use outMail365.
  • Mail Relay Outbound Service - SMTP Authenticated Internet Email Relay.
  • Standard SMTP ports - SMTP port 25 supported.
  • Alternative SMTP ports - additional SMTP TCP ports available to void your ISP blocking standard SMTP port.
  • 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).


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



 ApplicationKnowledge Base Article

MS Outlook 365

Microsoft Outlook 365 Setup guide

MS Outlook 2019

Microsoft Outlook 2019 Setup guide

MS Outlook 2007

Microsoft Outlook 2007 Setup guide

MS Outlook Express

Microsoft Outlook Express Setup guide

Mozilla Thunderbird

Mozilla Thunderbird Setup guide

Windows Mail

Windows Mail Setup guide

Windows Live Mail

Windows Live Mail Setup guide

Pegasus Mail

Pegasus Mail Setup guide

Microsoft Outlook 2011 for Mac

Microsoft Outlook 2011 (for MAC) Setup guide

Microsoft 365 for MacOS

Microsoft Outlook 365 (for MAC) Setup guide

Mac OS Mail

Mac OS Mail Setup guide


Eudora Setup guide

MS Exchange 2000

Microsoft Exchange 2000 Setup guide

MS Exchange 2003

Microsoft Exchange 2003 Setup guide

MS Exchange 2007

Microsoft Exchange 2007 Setup guide

MS Exchange 2010

Microsoft Exchange 2010 Setup guide

MS Exchange 2013

Microsoft Exchange 2013 Setup guide

MS Exchange 2016

Microsoft Exchange 2016 Setup guide

MS Exchange 2019

Microsoft Exchange 2019 Setup guide

Microsoft 365 Exchange

Microsoft 365 Exchange Setup guide

Novell Groupwise

Novell GroupWise Setup guide


Postfix Setup guide

After numerous issues with my mobile service provider becoming spam blacklisted, and accessing my mail from many differing ISP’s at clients sites. Outmail has lifted a great weight off my shoulders and I’m recommending it to ALL my clients.

It took seconds to set up and I was sending mail in a matter of minutes, from laptop and mobile phone. No hassle and no irate phone calls to service providers tech departments.

Ken Thomson, KMT Consultancy, Newcastle, UK