can't get gmail reset password

[duysop]

2025/05/07 15:39:32.377|0031|Erro| [_3CX.Mail.MailSenderService] Send mail failed: 535: 5.7.0 Denied
2025/05/07 15:39:32.409|0031|Erro| [_3CX.Authorization.ResetEmailService] Reset password email sent failed
MailKit.Security.AuthenticationException: 535: 5.7.0 Denied
---> MailKit.Net.Smtp.SmtpCommandException: 5.7.0 Denied
--- End of inner exception stack trace ---
at MailKit.Net.Smtp.SmtpClient.AuthenticateAsync(Encoding encoding, ICredentials credentials, CancellationToken cancellationToken)
at _3CX.Mail.SmtpMail.SmtpConnect(ISmtpClient smtpClient, CancellationToken cancellationToken)
at _3CX.Mail.SmtpMail.SendAsync(TcxMessage message, CancellationToken cancellationToken)
at _3CX.Mail.MailSenderService.SendMailAsync(TcxMessage message, CancellationToken cancellationToken)
at _3CX.Authorization.ResetEmailService.ResetEmail(String username, String email, String originatorIp)

 

[bitn2]

You need to check your IP address. The FQDN IP address must be the same as the one 3cx uses to access the internet.

 

[DimitrisL_3CX]

Hello @duysop

This usually happens when the Public IP your 3CX is actually using is different than what you have set in Admin > Advanced > Network.

Please try this:

• Navigate under the Dashboard >> Advanced >> Network
• Set the system to Dynamic IP
• Restart the services of the phone system
• When the PBX detects the new IP address go back in Network Settings set the IP to Static and add the new IP
• Restart the services once again.


Once you do this, wait a few minutes, then go to Admin > System > Email and while you have the "3CX SMTP server" selected, press the "TEST" button to see if it succeeds.