Email errors and troubleshooting
Solutions for bounced emails, blocked sending, and attachment errors
6 articles
- Email bounced back saying an error occurred when delivering to recipientThis article will go through the multiple reasons emails bounce back when being sent through Kolleno.
- Why You Can’t Reply to Emails from onmicrosoft.comReplies to @onmicrosoft.com addresses are blocked as they aren’t monitored or customer-facing.
- Troubleshooting Email Errors with Invoice PDF AttachmentsError sending invoice email due to PDF attachment issue—check ERP or contact your admin.
- Difference Between Manual and Workflow Emails With BOUNCE or COMPLAINT Contacts (Custom DNS Only)Understand how manual and workflow emails handle BOUNCE/COMPLAINT contacts and how to fix blocked workflows.
- Troubleshooting Duplicate Email SignaturesLearn how to identify and resolve duplicate signatures appearing in Kolleno automated emails due to external email client configurations.
- Securing Your Microsoft 365 Integration with KollenoMFA, sign-in restrictions, and account security best practices protect your Outlook integration with Kolleno.