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- Gmail:
SMTP Host: smtp.gmail.com
SMTP Secure: TLS
SMTP Port: 587
SMTP authentication:  Yes

- Hot mail
SMTP Host: smtp.live.com
SMTP Secure: TLS
SMTP Port: 587
SMTP Authentication: Yes

- ZOHO MAIL
SMTP Host : smtp.zoho.com
Type of Encryption : SSL
SMTP Port : 465

- YAHOO
SMTP Host : smtp.mail.yahoo.com
Type of Encryption : SSL
SMTP Port : 465

- OUTLOOK
SMTP Host : smtp.live.com
Type of Encryption : TLS
SMTP Port : 587

- elasticemail
Service to Send Mail Through: Other SMTP Server
SMTP Host: smtp.elasticemail.com
SMTP Port: 2525 -> if port 2525 is closed, use 25 or 465 or 587
SMTP Encryption Type: None / SSL / TLS
SMTP Authentication Mode: Login
Username for selected email service: Use your Elastic Email API Key
Password for the selected email service: Leave empty for no change
-> You may need to use your API key as both your username and password.

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NOTE: google need 2-step & generate app password.
https://support.google.com/accounts/answer/185833?hl=en