Hi, I am a solo small business user, and use several email addresses on multiple devices. Until recently I did it all with separate POP accounts in order to maintain a simple inbox structure, but this has become unmanageable for obvious reasons.

I have embraced Win10, OneDrive and Office 365, and want to streamline my email. I have found multiple IMAP accounts to be clumsy, so I have decided to let Outlook fetch my mail from all my other accounts and deliver to a unified inbox structure using rules. This works extremely well so far.

However, I need to configure Outlook to 'send as' the appropriate account, ideally automatically selecting the receiving address when replying (this worked well with multiple POP accounts), but I could get into the habit of manually selecting the appropriate send address if necessary.

Unfortunately the best I have got so far is to send from the default address 'on behalf of' another address. The information I have found online suggests that to 'send as' I need to have my alternative addresses in my GAL, however I cannot find how or where to do this as a layperson.

Can you help me?