Relevant Products: Exclaimer Cloud - Signatures for Office 365 | Exclaimer Cloud - Signatures for G Suite
Do recipient rules work for all signatures?
Recipient rules are only available for use with server-side signatures.
In the case of client-side signatures, the signature is added to the email as it is composed.
As Exclaimer Cloud is unable to determine the recipient of the email, the signature cannot be applied based on the recipient.