Warning: mail () [function. mail]: Failed to connect to mailserver at "localhost" port 25 &

Warning: Mail () [function. mail]: sendmail_from not set in php. ini or custom from header missing in .....

Warning: Mail () [function. mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php. ini or use ini_set () in.....

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Many people use the mail function provided by php for the first time to send emails. The above problems may be confusing. In fact, they are not, but you are running locally, the email sending server is not included, so there will be an appeal issue. Of course, the simplest solution is to use the encapsulated php email sending class, such: powerful phpemali ......