ASD's Blueprint for Secure Cloud

Mail flow

This section describes the configuration of mail flow within Exchange Online associated with systems built according to guidance in ASD's Blueprint for Secure Cloud.

Estimated reading time: 2 minutes

General

ItemValue
Turn off plus addressing for your organisationNot checked
Turn on sending from aliasesNot checked

Security

ItemValue
Turn off SMTP AUTH protocol for your organisationChecked
Turn on use of legacy TLS clients

Reply-all Storm Protection

ItemValue
Enable reply-all storm protectionChecked
Minimum number of recipients2500
Minimum number of reply-alls10
Block duration6

Message Recall

ItemValue
Enable cloud-based message recallChecked
Allow users to recall messages read by the recipientChecked

Security & Governance

  • None identified

Design

  • None identified

Configuration

  • None identified

References

  • None identified

Do you have a suggestion on how the above page could be improved? Get in touch! ASD's Blueprint for Secure Cloud is an open source project, and we would love to get your input. Submit an issue on our GitHub, or send us an email at blueprint@asd.gov.au

Acknowledgement of Country icon

Acknowledgement of Country
We acknowledge the Traditional Owners and Custodians of Country throughout Australia and their continuing connections to land, sea and communities. We pay our respects to them, their cultures and their Elders; past, present and emerging. We also recognise Australia's First Peoples' enduring contribution to Australia's national security.

Authorised by the Australian Government, Canberra