This guide provides an overview of the configuration settings required in Mimecast for enabling the outbound SMTP relay feature. The outbound SMTP relay feature is used for compliance archives that require submission over SMTP.
- Mimecast Administrator
- Add Nuclei IP Addresses to "Authorized Outbounds" (outbound SMTP relay feature)
Add Nuclei IP Addresses to Authorized Outbounds
Review the configuration requirements outlined in the following help center article:
Ensure that Nuclei's IP addresses have been added and are visible on the Authorized Outbounds list.
- Journal Type should be Standard EML Format
- Enable the check for Journal Non Internal Addresses
For support completing the Mimecast SMTP relay configuration please contact Nuclei's support team at email@example.com.