When sending to a Gmail recipient, Gmail rejects the inbound message and returns a bounce message containing the error message below.
The message will be retried for another 30 hours.
Reason: Mail Server for gmail.com could not accept your email at this time.
MailEnable will keep trying to deliver this message and will notify you of any progress.
The remote mail server returned the error:
421-4.7.0 This message does not have authentication information or fails to pass
Gmails filtering service requires the sending domain to pass various tests. I.e.: DKIM, SPF or DMARC.
Implement SPF and DKIM on the sending domain to avoid Gmail from rejecting your messages and avoid further delivery failures. SPF does not require any configuration changes within the mail server, but does require you add a DNS entry for the domain.
|Product:||MailEnable (All Versions)|
|Class:||TRB: Troubleshooting (Configuration or Environment)|
|Revised:||Monday, July 23, 2018|