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How to resend your Gmail mail merge campaign when you get errors

In the last few days, we’ve noticed an increase in the number or errors returned to GMass by the Gmail API. The Gmail API is the interface by which GMass connects to your Gmail account and sends email messages through your Gmail account. When the Gmail API spits back an error, it is usually temporary and intermittent and errors received during campaign sending can be overcome by resending your email to just the recipients that resulted in errors in the first place.

These errors are taking place on Google’s servers and are not indicative of anything being wrong with GMass.

Usually you will notice errors in the form of a “backend error” from the Gmail API and you will see these in the email confirmation that you get after a campaign finishes sending. You might see:

Google.Apis.Requests.RequestError
Backend Error [500]
Errors [
        Message[Backend Error] Location[ – ] Reason[backendError] Domain[global]
]

listed under the Individual Recipient Send Errors of the email confirmation.

If you see that your mail merge campaign resulted in these errors, you can resend your campaign to just the email addresses that didn’t receive it because of this error.

The GMass team is working on a way to automatically re-try sending these emails, but for now, you can follow the instructions below to manually resend your campaign to the errored addresses.

Using the GMass manual follow-up tool, doing so is just a matter of a few clicks.

1. Click the red @ button near the Gmail Search bar. This is the manual follow-up tool.

2. Choose the campaign from the dropdown that experienced the blocking.

3. Under Behaviors, choose Gmail API Errors.

4. Next click the main COMPOSE FOLLOW-UP button.

5. A Gmail Compose window will launch and the To field will be filled with the addresses you want to send to, the addresses that previously blocked your campaign.

6. Next load up the content of your campaign by clicking the GMass Settings arrow and choosing your original campaign from the Load Content dropdown. Your Subject and Message will be set.

7. Lastly, ensure all other GMass Settings are how they should be, such as Tracking of opens and clicks, and make sure the Schedule is set to the desired time of sending.

8. Finally, hit the red GMass button to send. Your campaign will now go to the email addresses that errored out the first time.

2 Comments
  1. Will a re-enqueued campaign send an email again to the ones that have already successfully sent or just to the ones that were not successfully sent?

    I have:

    "Successful sends: 151
    Emails remaining to be sent: 237"

    and I don't want to email the 151 people again.

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