Invalid 7bit DATA

[Zoltan67]

Dear all,

There are more and more of my users that complain with return message caused by invalid 7bit DATA. Is there anything that can be done to avoid this ? THis is really becoming more an more frequent...

Here is the full error message:
552 5.2.0 Invalid 7bit DATA (in reply to end of DATA command)

Thanks in advance !

[Zoltan67]

Nobody has any clue about this point ? Is there a way to know where does this come from, and what we can do to stop this ?