What is the proper way to set the "from" email address to some common email address, such as accounting@somecompany.com (not a personal mailbox) when sending invoices?

There is a setting in the sales ledger>>invoice mail settings to specify the sender's address, though if I specify a conference here I cannot see the these mails in my mailbox, I have to open a conference, even though I specify the same conference access group in my personal mailbox and the conference (maybe I have missed something here).