Connecting To Gmail IMAP PHP "Couldn't Open Stream"


Answer :

You need port 993, the SSL IMAP port.



Port 995 is the SSL POP3 port.



I think Gmail's IMAP can only be accessed on port 993.



$hostname = "{imap.gmail.com:993/imap/ssl/novalidate-cert}";



I had the same error and found a different solution. I have added debug info into host:



"{imap.gmail.com:993/debug/imap/ssl/novalidate-cert}INBOX";


When I read php error log, I found 



Unknown: [ALERT] Please log in via your web browser: https://support.google.com/mail/accounts/answer/78754 (Failure) (errflg=1) in Unknown on line 0


Open link, and follow instructions. Search for




Your app might not support the latest security standards. Try changing
a few settings to allow less secure apps access to your account.




Click on link and enable less secure app access.



Then it works for me.



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