GMAIL "Send mail as" Authentication Failure

GMAIL "Send mail as" Authentication Failure

I set up sending my ZOHO email through GMAIL. By following instructions in ZOHO help, I was able to send ZOHO in my gmail account. However, it suddenly failed several days ago. So I tried to set it up again, and I always gave the following error:

Authentication failed. Please check your username/password. [Server response: 535 Authentication Failed code(5350)]

Here are my settings:

  • Account name: simon.wu@coboosting.com
  • Two-factor Authentication: disabled
  • Pop and IMAP: both enabled in ZOHO settings
  • SMTP server used in Gmail: smtp.zoho.com
  • Port: 465
  • Authentication: SSL

There is definitely no issue in inputting password.

I am not sure why it worked before and suddenly failed several days ago, and then no longer worked anymore.


-Simon
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