Update server settings in Gmail
If we have set up your website emails in Gmail, the server settings in Gmail may need to be updated in the event of any server upgrades. Here is how to edit these settings.
1. Log into Gmail, and click on the gear icon in the top right. Then, click Settings.
2. Click on the Accounts or Accounts & Import tab.
3. You will need to edit the server information next to both the Send mail as and Check mail from other accounts sections. Click Edit info next to each address, and enter the SMTP/POP server information, and the password.
4. Save the changes.