Auto Complete for Organisation Emails

I use Mailspring for all my emails (and I really like it) including those from my organisation which is provided by Google’s GSuite. When composing mails on the web or on just normal app, I just have to know the recipient’s name and I get suggestions of possible email addresses within the organisation.
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When using Mailspring, this feature however is not there. I either have to ask for their emails or just compose the mail from Gmail which is tedious.

(Originally posted by ckkibet on GitHub.)