Do be aware that classic outlook will cease to exist (or at least not supported) in I think 2029. Although Classic (i.e. the outlook application) is still available, at some point you won't be able to download it. For individuals like yourself it is not likely to be a major issue but if you are supporting companies who are constantly buying in new devices and installing office, they may not be in a position to install classic earlier that 2029.
So you may need to be thinking about it now. For sending there is CDO which should continue to work since it uses the smtp server which is what your email provider uses. But for receiving emails you typically use POP3 (emails stored on your machine) or imap, mail or a couple of others where the emails are stored on the email providers server. Once the outlook.application is no longer available you will not be able to access them.
Options are being reviewed - Powershell has been mentioned and there is also the Graph API both of which will work with incoming and outgoing emails. But there is quite a learning curve and not necessarily easy to install and implement.
This is not an access problem, but any application that uses outlook automation - word and excel immediately spring to mind.