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what does an SMTP error of 4.0.0 all sources disabled when emailing gmail email addresses mean?

We're seeing a lot of soft bouncebacks with SMTP error 4.0.0 all sources disabled when emailing gmail email addresses.

We are on pod 4 and use Eloqua's shared IP.

Anyone know what that SMTP error means exactly and most importantly how we can resolve it?

Answers

  • Hello Sarah - please submit a Service Request through My Oracle Support and ask for this to be investigated by the Deliverability Team. There could be a number of reasons for this type of temporary error and I don't want to speculate without having all the details. We are happy to take further look to diagnose the issue and provide appropriate recommendations for you within the support ticket. Thanks!

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