It clearly states it in the log "Application-specific password required" and one should know better if they're up to date with their service provider's changes. Moreover, you won't get anywhere with that attitude.

Phpmailer works fine here.

@questions
Why should anyone put some proves here? Not getting it man. Why we should prove that 3rd party library works? Do it by yourself... Wake up.

Checked gmail without SMTP enabled. It behaves like "everything alright" but email never receive.
When enabled SMTP authentication and checked PHPmailer logs, it was clear it's not functional because setup was not correct. It require updates on gmail side.

It's reasonable considering gmail require 2-factor authentication, that it cannot work just with standard password only.

Code: [Select]

2023-03-13 11:38:37 4 SMTP INBOUND: "534-5.7.9 Application-specific password required. Learn more at"
2023-03-13 11:38:37 4 SMTP INBOUND: "534 5.7.9  https://support.google.com/mail/?p=InvalidSecondFactor k19-20020a17090632d300b008dffda52d71sm3294409ejk.124 - gsmtp"
2023-03-13 11:38:37 2 SERVER -> CLIENT: 534-5.7.9 Application-specific password required. Learn more at
534 5.7.9  https://support.google.com/mail/?p=InvalidSecondFactor k19-20020a17090632d300b008dffda52d71sm3294409ejk.124 - gsmtp

2023-03-13 11:38:37 1 SMTP ERROR: Password command failed: 534-5.7.9 Application-specific password required. Learn more at
534 5.7.9  https://support.google.com/mail/?p=InvalidSecondFactor k19-20020a17090632d300b008dffda52d71sm3294409ejk.124 - gsmtp

2023-03-13 11:38:37 4 SMTP Error: Could not authenticate.
2023-03-13 11:38:37 1 CLIENT -> SERVER: QUIT


Appreciate your support. Had no issues with installations at all.. have nothing to say with the software as it all work good.. but this... ?
I have disabled the 2 factor with Google still did not managed to send messages. They were saying that there is something wrong with the software. They said nothing wrong with our auth.