SMTP error data not accepted

[vlatko.surlan]

I am getting these here and there on a pretty old installation. I've seen a few threads around about the issue but nowhere is there any definitive solution. Has there been any new info about this issue?

Thank you for your time.

[vlatko.surlan]

I forgot to mention that even though the installation is old it has been regularly upgraded and is not the latest CE available.

[mansi_rana]

The "Data not accepted" error message is coming from your SMTP server. Usually when you get this message, your email shouldn't be sent, because it's being rejected by your SMTP server. In your case, it seems your SMTP server is able to send to the email just fine, but yet also generating unnecessary error message. To fix this, I suggest to contact your host tech support and ask them regarding this. They should be able to fix it from their side.