"Acronis Email Security"

This page includes:

About connecting email services

"Acronis Email Security" can be integrated with the following email services:

Microsoft 365 [Office 365] - Inline or API [Refers to Microsoft Exchange Online]
Google Workspace [Gmail]
Microsoft Exchange [Refers to Microsoft Exchange On-Premises]
"Other" - any email service that is not one of the three above

Each of these email services must be correctly onboarded and configured to enable the integration with "Acronis Email Security" to function.

By default, the email integrations scan incoming emails only - not outgoing emails.
[Outbound scanning can be configured for Microsoft 365 [Inline and API] - see Onboarding Microsoft 365 - Outbound. Outbound scanning can't be configured for Google Workspace or Microsoft Exchange.]
Internal email is not scanned.

Emails that have both the sender and recipient within the same domain and tenant are considered to be internal email.
Only a single email service integration type [Microsoft 365 Inline, Microsoft 365 API, Google Workspace, Microsoft Exchange, or "other"] can be configured in any organization at any time. If you require more than one integration type - for example, Google Workspace and Microsoft 365 Inline - then you'll need to create an organization for each of the required integration types.

Maximum email sizes for scanning

Microsoft 365 Inline and Google Workspace

"Acronis Email Security" scans email messages up to a maximum size of 40 MB [including attachments]. Larger email messages are not scanned by "Acronis Email Security", and will be delivered to the specified recipients.

Note:

Due to external technical limitations, the 40 MB limitation can't be increased.
We recommend that you limit receiving email attachments up to 30 MB in size. Files that are larger than 30 MB should be shared using a different file sharing service, such as Microsoft OneDrive or Google Drive.

Microsoft 365 API integrations

"Acronis Email Security" scans email messages up to a maximum size of 500 MB [including attachments].
Microsoft Exchange and "Other" integrations

"Acronis Email Security" scans email messages up to a maximum size of 40 MB [including attachments]. If a message exceeds 40 MB, the email will not be sent, and a Non-Delivery Report (NDR) or bounce notification will be generated. This NDR will indicate that the message size limit was exceeded [for example: "552 Message is too long"]. The NDR will be sent to the sender.

Which email addresses are protected

Each email integration can protect either:

all the email addresses inside all the domains in the organization account [Full account protection]

- or -
a partial set of email addresses inside the organization account [Partial account protection]

Partial account protection applies to Microsoft 365 API integrations only.
- With Microsoft 365 API integrations, you can configure "Acronis Email Security" to protect a subset of the email addresses in the Microsoft account, and billing will then be based on the number of email addresses in the subset.
- With Google Workspace integrations and Microsoft 365 Inline integrations, although it is possible to configure "Acronis Email Security" to protect a subset of the email addresses in the account, billing will be based on the full number of email addresses in the account. Therefore, with Google Workspace integrations and Microsoft 365 Inline integrations, partial protection should be used for PoC installations only.
With Exchange and "Other" integrations, all users in the account are protected - it is not possible to protect only specific users or specific groups.

Email connection procedures

For connection procedures, click any of the email services below: