Gmail SMTP not Working
There are millions of people who use Gmail daily for their different purposes. If you are also one of them & facing Gmail SMTP Problems, then you can easily fix it by enabling & disabling the IMAP on your Google Settings:
1) Open Gmail & login to your account.
2) Now go to the settings of Gmail
3) Then, go to the Forwarding & POP/IMAP settings.
4) Re enable the IMAP toggle there.