Big Business Mail has been in testing for a while and is a bit complicated but has uses.

10042 'SMTP 550 - Requested action not taken: mailbox unavailable' may indicate your account is protected and needs to be authorized. For Hotmail.com, Outlook.com, etc. accounts sign in with a browser to check for alerts.

This Solution provides troubleshooting information (6504)

Sent Emails extends built-in Notes to include Emails. Notes then include:
• Sent Notes - messages sent from one Employee to another
• Dated Notes - messages assinged a date
• System Notes - messages from automatic imports and connections
• Sent Emails - copies of sent emails, along with attachments

When saving or printing, choose any Email option and a Note will be saved along with attachments including the PDF of the printed transaction or report.

This Solution provides setup instructions. (7016)

Mail lets BigBusiness connect directly to an email service bypassing your email client.

Mail Plugin adds next-level features in BigBusiness for sending email without a client.

Emailing features use your email client to send messages and work without this plugin.

Plugins help you extend your BigBusiness use with fast and reliable custom functions.

Shopify Plugins handle your Shopify Web orders and Shopify POS invoices as needed.

Mail Plugins let BigBusiness send mail notifications and automate emails to customers.