A List of SMTP and IMAP Server

https://www.arclab.com/en/kb/email/list-of-smtp-and-imap-servers-mailserver-list.html

Important Update In Regard To Using Gmail, Yahoo, or Outlook As Your SMTP Provider:

Please Note:

Your SMTP provider may have daily limits on how many emails can be sent. Gmail, for example, has a limit of approximately 100-150 emails per day when connected to the server from a remote email client.

In regard to setting up Google/Gmail/Gsuite:

Using Google/Gmail/GSuite as your SMTP Provider

Setting alias for Google smtp

In regard to setting up Yahoo:

Yahoo temporarily disabled their SMTP and there's no ETA on when it will be available again.

In regard to setting up Sendgrid:

Using SendGrid As The SMTP Provider

In regard to setting up Zoho:

Using Zoho as your SMTP Provider

In regard to setting up Amazon SES:

• Use the correct server name listed on the SMTP Settings page

• Use port 465

• Use the IAM Username & Password you created ( and hopefully saved because you can't view it again )

• Use the Amazon AWS Root User Email Address

Amazon SES Quick Start

• https://docs.aws.amazon.com/ses/latest/DeveloperGuide/quick-start.html

Managing Your Amazon SES Sending Quotas

• https://docs.aws.amazon.com/ses/latest/DeveloperGuide/manage-sending-quotas.html

Moving Out of the Amazon SES Sandbox

• https://docs.aws.amazon.com/ses/latest/DeveloperGuide/request-production-access.html

In regard to setting up Outlook / Microsoft Office 365:

It is common to get the error Authentication unsuccessful even though the two-step verification is OFF. Microsoft changed its security. Now a third-party app requires SMTP Authentication to be enabled. Here is the guide to enabling SMTP > https://docs.microsoft.com/en-us/exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-microsoft-365-or-office-365

If the above article is not helpful, please reach out to Outlook support to get the account authenticated.