I see EM Client recently released a new workaround to fix Outlook.com emails getting stuck in Sent Items.
Workaround for the sending issue via SMTP for Microsoft Outlook.com accounts | eM Client
…Since I also have a Gmail account in EM Client, might this new ‘ActiveSync’ fix stop my Gmail working? (I read somewhere ActiveSync may not always work with Gmail (e.g. free accounts and newly set-up Gmail accounts).
Thanks in advance