Is there any way to elevate this to the WorkMail team to be fixed?
We're using IMAP for what it's worth. What is Windows Outlook doing different for it to work, that Mac clients cannot do?
We're considering moving away from WorkMail due to the lack of this feature, but we'd really prefer not to.
I'm sorry to inform you that in this case this is a limitation of AWS WorkMail. Sending from an alias is only supported in Windows Outlook and the WebMail. https://docs.aws.amazon.com/workmail/latest/userguide/email-messages.html#send_alias
Kind regards, Robin
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