Cant send mails using smtp

i want to enable SMTP on my droplet so that i can send mails.

i followed the tutorial :

the code is working fine when i use php <scriptname>.php

but when i use browser i get this error in my logs :

 cannot connect to, port 465: Permission denied
msmtp: could not send mail (account gmail from /etc/msmtprc)
msmtp: cannot log to /var/log/msmtp.log: cannot open: Permission denied
msmtp: log info was: tls=on auth=on user=**@**.com from=**@**.com recipients=**@**.com errormsg='cannot connect to, port 465: Permission denied' exitcode=EX_TEMPFAIL

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Please double check the permission of the /.msmtprc folder:

chmod 600 ~/.msmtprc