sudden loss of delivery on AWS SES

[nadworks]

In the middle of a campaign, delivery suddenly stopped and has not worked since.
The error is:

Error executing "SendRawEmail" on "https://email.us-east-1.amazonaws.com"; AWS HTTP error: Client error: `POST https://email.us-east-1.amazonaws.com` resulted in a `403 Forbidden` response: <ErrorResponse xmlns="http://ses.amazonaws.com/doc/2010-12-01/">
<Error> <Type>Sender</Type>
<Code>SignatureDo (truncated...) SignatureDoesNotMatch (client): Signature not yet current: 20200924T194203Z is still later than 20200924T194201Z (20200924T193701Z + 5 min.) - <ErrorResponse xmlns="http://ses.amazonaws.com/doc/2010-12-01/"> <Error> <Type>Sender</Type> <Code>SignatureDoesNotMatch</Code>
<Message>Signature not yet current: 20200924T194203Z is still later than 20200924T194201Z (20200924T193701Z + 5 min.)</Message> </Error> <RequestId>942996ab-bb95-4f58-ba39-84642cb22ca9</RequestId>
</ErrorResponse>

Any ideas? Something to do with the server time?

 

[nadworks]

Fixed it here.
It was (as the error suggests) a time sync discrepancy of more than 5mins between my server and AWS.
We corrected this at our end and all works again.
Must have drifted out of sync right in the middle of the campaign.

 

[twisted1919]

Make sure you install and enable NTP on your server to keep the time in sync.