Attachment Settings and Sender Exceptions are key features of Sendent for Outlook that empower administrators with enhanced control over attachment interactions. These tools not only improve security and compliance but also offer significant cost-saving potential.
When to use Attachment Settings and Sender Exceptions
Attachment Settings and Sender Exceptions prove valuable in various scenarios:
- Data loss prevention: Prevent accidental sharing of sensitive information via email attachments. Compliance adherence: Ensure all outgoing attachments meet regulatory requirements. Bandwidth management: Reduce strain on email servers by redirecting large attachments to Nextcloud.
- Version control: Maintain a single source of truth for documents by enforcing Nextcloud uploads.
- Cost reduction: Minimize email server storage costs by replacing large file attachments with Nextcloud links.
Who benefits from Attachment Settings and Sender Exceptions
Attachment Settings and Sender Exceptions cater to a wide range of users:
- IT Administrators seeking granular control over email attachments.
- Compliance Officers ensuring adherence to data protection regulations.
- Organizations dealing with large files or frequent attachment sharing.
- Companies prioritizing centralized document management and version control.
- Businesses looking to optimize their IT infrastructure costs.
Understanding Attachment Settings and Sender Exceptions
When enabled, Attachment Settings actively monitors all outgoing emails through the Outlook add-in. This powerful mechanism offers three attachment interaction modes:

- None: No interaction occurs.
- Ask every time: Sendent for Outlook prompts the user to upload files to Nextcloud every time it detects an attachment. Users can choose to ignore this notification if they prefer to send the attachment directly.
- Trigger on maximum attachment size: This mode works in conjunction with “Auto Upload Attachment Size”, measured in MB. Sendent for Outlook forces users to upload files to Nextcloud when the total attachment size exceeds the set value. A value of “0” triggers automatic upload for all files, while “5” activates the mode only when attachments exceed 5MB in total.
Excluding domains or specific email addresses
By default, a mode set to “MaximumAttachmentSize” intercepts all qualifying outgoing emails, enforcing Nextcloud uploads for both internal and external recipients.

However, this default behavior may not suit all scenarios:
- Internal emails might not always require enforced uploads.
- Some external communications may warrant exceptions based on mutual understanding and accepted risk.
- Organizational policies might prohibit users from clicking on links.
To address these situations, you can set up exceptions for specific addresses or domains. For detailed instructions, refer to our Knowledge Base article on address and domain exceptions.
Benefits of enforcing attachment modes
Implementing Attachment Settings and Sender Exceptions offers several advantages:
- Cost savings: By replacing large file attachments with Nextcloud links, you can significantly reduce email server storage requirements and associated costs.
- Enhanced security: Control how and where attachments are stored and shared, reducing the risk of data breaches.
- Improved compliance: Ensure consistent handling of email attachments across your organization.
- Optimized storage: Save valuable mailbox space, especially with Maximum Attachment Size enabled.
- Flexible control: Configure settings directly in the Nextcloud app, giving you full control over your organization’s attachment handling policies.
Wrapping up
Attachment Settings and Sender Exceptions in Sendent for Outlook offer a powerful way to enhance your organization’s email attachment management. By providing granular control, improving security, ensuring compliance, and potentially reducing costs, these features can significantly streamline your workflow and protect your sensitive data.