Taskalfa 4500i send error 2202

So, at this machine location they're using a relay server which then passes the info on to their email server. The copier is sending all the info to the relay server and then gives the 2202 error for some reason. The relay server knows the copier errors out and sends the email through despite this. So, I'm not quite sure what's at fault here. The IT guys for this customer are certain it has nothing to do with the relay server because they have several other things using it without any issues. I don't know if the relay server isn't sending the right responses to the copier and that's why it's coding out or if there's a setting in the machine that could resolve this.

I'm not very experienced in the emailing side of things as far as copiers are concerned so I'm not really sure what to do. Any thoughts about what could be causing this? Any advice is appreciated.