You can send mail from localhost with sendmail package , sendmail package is inbuild in XAMPP. So if you are using XAMPP then you can easily send mail from localhost.
for example you can configure C:\xampp\php\php.ini and c:\xampp\sendmail\sendmail.ini for gmail to send mail.
in C:\xampp\php\php.ini find extension=php_openssl.dll and remove the semicolon from the beginning of that line to make SSL working for gmail for localhost.
in php.ini file find [mail function] and change
smtp_port=587
sendmail_from = my-gmail-id@gmail.com
sendmail_path = "\"C:\xampp\sendmail\sendmail.exe\" -t"
Now Open C:\xampp\sendmail\sendmail.ini. Replace all the existing code in sendmail.ini with following code
[sendmail]
smtp_port=587
error_logfile=error.log
debug_logfile=debug.log
auth_username=my-gmail-id@gmail.com
auth_password=my-gmail-password
force_sender=my-gmail-id@gmail.com
Now you have done!! create php file with mail function and send mail from localhost.
PS: don't forgot to replace my-gmail-id and my-gmail-password in above code. Also, don't forget to remove duplicate keys if you copied settings from above. For example comment following line if there is another sendmail_path : sendmail_path="C:\xampp\mailtodisk\mailtodisk.exe" in the php.ini file
Also remember to restart the server using the XAMMP control panel so the changes take effect.
For gmail please check https://support.google.com/accounts/answer/6010255 to allow access from less secure apps.
To send email on Linux (with sendmail package) through Gmail from localhost please check PHP+Ubuntu Send email using gmail form localhost.
Src:
https://stackoverflow.com/questions/15965376/how-to-configure-xampp-to-send-mail-from-localhost