Note that it is highly recommended that you use a trusted SMTP service that is better suited to sending batch emails. Rather than using your own mail server. Using something like
MXRoute will ensure better
delivery of messages.
It is definitely
NOT recommended you use the SMTP settings of a shared server as IP blocks resulting from sending batch mail can impact other accounts and see
your own account suspended. Also, some web hosts don't allow batch mail, so check first.
See the docs for other recommended SMTP services or try a search on
Google.
IMPORTANT: If you are using Gmail, DO NOT use your Gmail password. You MUST create an app specific password in your Google account and use that. Also,
ONLY use SSL if you have SSL installed. If you don't, you should use TLS. For the Gmail port ONLY use 465 or 587.
Once your SMTP settings are in place, click the 'Send Test' link to send a test email. If you are on a development platform
Mailpit is a recommended tool
for easily testing emails.