Hi, just got an update from Nine, still waiting for bluemail
It seems that you were right - of course :)
Nine doesn’t support ActiveSync alias, because they believe its not possible:
Dear Robert,
Even though changing the sender email address with the alias on client, the email is changed back to main email address from server automatically when sending out the email to recipients.
It is the ActiveSync protocol limitation.
Unfortunately, it is unable to support on EAS client.
Eg)
A account: primary account
B account: alias account
C account: alias account
Send an email with B account
When the recipient receives the email, the email address is changed to A account because the server had changed the address with primary account.
We plan to support to add accounts for the ‘Send as’ manually.
Thank you for your patience.
Thanks,
9Folders Support Team