Mailer error: Cannot issue HELO to existing session. (Google Workspace)

chunheng

When replying to the support ticket, my team has noticed that the reply emails sometimes are not sent out.
This issue occurs randomly.
Please advise.

When I checked from the backend:

Mailer error: Unable to email via SMTP: xxxxxx@xxxx.xxx (tls://smtp.gmail.com:587/SMTP) Cannot issue HELO to existing session

Information of the support system

Information of the SMTP:

For SMTP email address used, I am using business domain email in Google Workspace subscription.

KevinTheJedi

chunheng

Well, for one you are using PHP 8.1 when v1.18.2 clearly says it requires 8.2-8.4. So that will be an issue. Secondly, the error is generic and simply says it could not issue a session. You'll need to find some better logs or do further testing to see what triggers it, how, etc. It may be a network issue, may be issues with the host, etc. We won't know until we get better or more detailed logs.

Cheers.

chunheng

[1] Updated the PHP version to 8.2 now (max from host provider)

[2] Regarding the generic error, I am requesting the host provider support to see if host's log has something amiss on that period.

KevinTheJedi

chunheng

I see there are quite a bit during the same minute timeframe. Hover all of them and see if all messages are the same or if some are different and more detailed.

Cheers.

chunheng

Hi Kevin,

All of them are same error message on same IP address.

chunheng

However, if I go further back...

Unable to email via SMTP: xxxxx@xxxxx.xxx (tls://smtp.gmail.com:587/SMTP) 4.3.0 Mail server temporarily rejected message. For more information, go to 4.3.0 https://support.google.com/a/answer/3221692 d2e1a72fcca58-742a9871500sm8761968b3a.131 - gsmtp

KevinTheJedi

chunheng

Online it suggests a network issue on your end, or temporary issues on the provider's end, or even SMTP server overload. I would reach out to your host and Google for further information. You can also check the various logs on the server (like PHP error logs, etc.) to see if there is an issue happening around those times that might be affecting this.

Cheers.