Error while sending mails from SAP

Hello Experts,

I am facing the below problem:

If an error occurs during the processing of a Z SAP transaction, an email needs to be sent to the user who is executing the transaction.

So, in this case the sender and receiver is the same user.

But the problem that i am facing is that for sending the mail from SAP, i have to maintain the email address in the user profile as blank. If I maintain some email address in the user profile, i encounter the following error:

Internal error: CL_SMTP_RESPONSE ESMTP error code is not known. 554 554 <email address>: Sender address rejected .

Please help me resolve this.

Thanks a lot in advance to answer the above query.

Regards,

Himanshu