Send High Volumes of Time-Sensitive Emails with Retarus

Exchange Online, the email infrastructure behind Microsoft 365 (formerly Office 365), is designed for employee correspondence with Outlook and certainly has its limitations. If you want to send a high volume of emails or time-sensitive emails from business applications like marketing automation tools, e-commerce applications, ERP, CRM or ticket systems, you need a specialist. Retarus helps you to avoid Office 365 sending limits with professional high performance email services.

Increase Email Deliverability from Your Business Applications

Order confirmations, access data, invoices, newsletters and more. With the flexibility to use any number of applications to send ten emails per day or ten million per hour, Retarus Transactional Email can handle this high volume of email without barriers like the Exchange Online or Microsoft 365 (previously Office 365) email limitations. With a CSA-certified high-performance email infrastructure, dedicated IP addresses, reputation management, dynamic IP routings and more. Our solution has everything you need to get your marketing and transactional emails around possible obstacles like the Microsoft 365 (formerly Office 365) email limit.

Retarus Transactional Email – Your Benefits

  • Send up to 10 million emails/hour without triggering Microsoft 365 (formerly Office 365) email limitations
  • Extremely high delivery rate
  • No volume or message size limits (attachment)
  • Integration via standard interfaces (SMTP, REST)
  • Unburden or even get rid of your own email infrastructure
  • Sophisticated reputation management
  • Dedicated and shared IP addresses
  • CSA-certified with allowlisting for large ISPs
  • Bounce management included
  • Detailed tracking and reporting
  • Best in class support
  • Data centers can be audited anytime
  • Compliant data processing
  • Become independend from Exchange online and Microsoft 365 (former Office 365) email limits.

Good to Know

Sending Limits

Exchange Online customers who need to send legitimate commercial emails (e.g. customer newsletters) should consult with a third-party vendor specialized in these services.

Retarus Transactional Email

Want to learn more about Retarus Transactional Email? Read more about features, options and technical specifications.

Retarus Deliverability Guide

Learn More about How to Successfully Send Transactional and Marketing Emails without Facing any Microsoft 365 Email Limitations.

Certified Sender Alliance

With Retarus Transactional Email, desktop and application communication is automatically kept separate, making it much more secure. All the while there is no need to operate or service email servers, saving you time and money.

Retarus Transactional Email for Real World Applications