Mail for MAC - Unable to handle 2 accounts pointing to the same server

How did you determine "I am unable to send/receive mails from one of them, since they both point to the same SMTP server."? What happens when you try? What error messages do you get?

You can have as many accounts on the same server as you want, if your email provider allows. Each has a unique username and password. The accounts are not aware of each other and each can send/receive for their respective account. So it is not clear to me what the issue is. Are you maybe trying to use the same credentials for two accounts in error?

Your email server likely has thousands of users all using the same server without issue so you having two or more accounts will not cause a problem.

Yeah this is a bug, foible, of Mac Mail.

If you want a mail program that actually works correctly you will have to stop using the included Mac Mail program and switch to some other email client.

In the long run you will be saving yourself many headaches that Mac Mail will cause you.

If you already have one SMTP account set up at mail.xyz.com, and you then start manually creating a second SMTP entry for the other account, at mail.xyz.com, Mail will attempt to autofill the first account's details. Do not let it. (Or, if it already has, edit the server name and remove the email address it's added to the end of the server name).

You will need to go in manually to the SMTP server list, add a new entry, remove any auto fill Mail tries to add, and enter the second account address and password.

Matt

Continuing with what Matt says, then, mark the account to only use that SMTP server.