Send as from another mailbox
Use this procedure when the sender address is another mailbox and requires SMTP authentication with an app password.
Primary mailbox
Login to mailbox you want to set up as sender (so if you want to send, lets say forwell email from your opscore login to opscore).
Go to settings and to accounts

On accounts click on add another email address

UNTICK THE BOX, type the desired name (Name Lastname for example) and paste mail you want to link (so, you are in opscore mailbox, setting it up to send forwell email - type that forwell email)


NOW MOVE TO THE MAILBOX YOU ARE ADDING
Log to the other mailbox and go to Manage your Google Account

Go to Security and to 2SV

Go to App passwords

Give it a name and click create

Password is in the format of 4 characters in 4 fields. COPY IT and NO NOT CLOSE THE POPUP UNTIL YOU FINISH SETTING UP

Paste the password in the password field and click on Add Account

Next pop-up will notify you about success.

Click close and go to the mailbox OF THE MAIL YOU ARE ADDING TO OPS as indicated on the popup.
Mail is in this format, click on the link

Confirm

And you will get confirmation

Go back to opscore and you will see added mailbox. In unverified status.

Refresh the page and it should look like this
























