hassle free emailing, no more SMTP 550 errors, no more relaying denied with a safe and secure email service.
  • Robert John Associates
    I’d taken my laptop to Australia with me and Outlook was feeding me incoming e-mails with no trouble but I couldn’t get anything to send.  A call to Prolateral instantly diagnosed the problem and offered a solution which they put in place in minutes. It solved another problem I didn’t even know I had too!  Great service, thanks! Robert John, Marsworth, Buckinghamshire

Setting up your email application to use outmail (SMTP Smarthost & mail relay).

Make your setup easy follow the instructions provided below. Simply click on the desired application. Note your username and password will be sent to you after your account has been activated.  Your account details can also be managed in the outmail portal.


Client Applications 

 ApplicationKnowledge Base Article

MS Outlook 2007

Microsoft Outlook 2007Setup guide

MS Outlook Express

Microsoft Outlook ExpressSetup guide

Mozilla Thunderbird

Mozilla ThunderbirdSetup guide

Windows Mail

Windows MailSetup guide

Windows Live Mail

Windows Live MailSetup guide

Pegasus Mail

Pegasus MailSetup guide

Mac OS Mail

Mac OS MailSetup guide

MS Outlook 2011 for Mac Icon

Microsoft Outlook for MacSetup guide


EudoraSetup guide


Server Applications 

 ApplicationKnowledge Base Article

MS Exchange 2000

Microsoft Exchange 2000Setup guide

MS Exchange 2003

Microsoft Exchange 2003Setup guide

MS Exchange 2007

Microsoft Exchange 2007Setup guide

MS Exchange 2010

Microsoft Exchange 2010Setup guide

Novell Groupwise

Novell GroupWiseSetup guide


PostfixSetup guide


Zimbra 8.0Setup guide


Zimbra 8.5Setup guide


Mobile Devices 

 ApplicationKnowledge Base Article

Apple iPhone

iPhoneSetup guide

Apple iPad

iPadSetup guide


AndroidSetup guide

Windows Mobile

Microsoft Windows MobileSetup guide


CMS (Content Management Systems) 

 ApplicationKnowledge Base Article

Joomla! CMS

Joomla!Setup guide


WordPressSetup guides



 ApplicationKnowledge Base Article

VB .Net

VB .NetDev Notes


CakePHPDev Notes


PHPMailerDev Notes


Perl (Mail::SendMail)
Perl (Net::SMTP_auth)
Dev Notes
Dev Notes


Summary of server details


Outgoing server


Outgoing server protocol


Outgoing server port

25, 587, 2525 or 8025

Authentication Type

Basic Authentication


As provided


As provided