Yesterday we’ve released version 10.3.2545 https://www.emclient.com/dist/v10.3.2545/setup.msi
where we changed the default for sending emails back from AirSync to SMTP protocol, as it seems the bug on Microsoft side with SMTP authentication is hopefully finally fixed. This means the wrong from address when using aliases issue should now be resolved for all the users with no need to change some settings or registry hacks.
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