SMTP Protocol Returned a Permanent Error 550 client

HCL Domino Domino Forum
1

Hi we’re getting SMTP error when emailing a Google Apps Domain.

Whenever we send emails to the google apps domain we get the following error:

“SMTP Protocol Returned a Permanent Error 550 client”

I’ve checked and we both have valid SMTP servers with valid MX records; although we have an SPF record (i.e. v=spf1 mx -all), but the recipient has no SPF record.

Does Domino’s SMTP service block recipients that have no SPF record?

2

Subject: Here’s a Way to Get More Info

You can try increasing the information that will be collected during an SMTP session by setting the following NOTES.INI line on the Domino Server that is sending outbound SMTP mail:

SMTPClientDebug=1

This will spew all kinds of information into the Miscellaneous Events area of your Domino log and can give you some insight into what specifically is causing the disconnect. There are lots of reasons why this could be happening.