A place I do some work for has lost an employee recently. I've removed his email account from our server after having a courtesy auto-responder for a while, but I've realised he has a Gmail account which is configured to "send mail as" his work address.
I would like to be able to remove his ability to send email from the work domain, but I don't have access to his Gmail account to remove the setting.
Does Google offer any mechanism or recourse for this situation? He can continue to send mail under the banner of our domain name even though he has ceased to work at the company as long as this setting persists.
Best Answer
I worked it out.
In the original email that Gmail sent out to the external address in order to "verify" it there was the following section:
I found it just by grepping his maildir, clicked the link and it said he can no longer send using his work address.
I realise you can just spoof the "from" headers willy-nilly, but you have to be technically savvy enough to know that this is possible and 99% of my users are not, including this one.