problem with the module PayPalAPI

[adamus007p]

A client has encountered a problem with the module PayPalAPI, see the report:

PayPal response:
TIMESTAMP -> 2011-01-30T23:55:48Z


what is mean? what is the problem?

[adamus007p]

This is the mail system at host xxx.xxxx.com.

I’m sorry to have to inform you that your message could not
be delivered to one or more recipients. It’s attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system

: host mail.homail.fr[80.92.66.174] said: 554 5.7.1 : Relay access denied (in reply to RCPT TO command)

Final-Recipient: rfc822; [email protected]
Original-Recipient: rfc822;[email protected]
Action: failed
Status: 5.7.1
Remote-MTA: dns; mail.homail.fr
Diagnostic-Code: smtp; 554 5.7.1 : Relay access denied

————— Forwarded message —————
From: [email protected]
To: Florian Woxxxx
Date: Mon, 17 Jan 2011 17:37:17 +0100
Subject: [xxxxxxxx] Payment accepted

[Robert G.]

1. Nothing. TIMESTAMP is a proper response. There's an issue in the 1.4 beta 5 release where TIMESTAMP is returned by email as being an error, even if debug mode is turned off. No need to worry about this.
2. You're getting that email returned because someone entered [email protected] as the store administrator's email address. Note the missing t in homail Change the email address of your store administrator to correctly show @hotmail.fr

[Peter Phelan]

I am getting the same TIMESTAMP error email report in 1.3.6, so do I just ignore this too then please? The transaction time is correct and everything seems to go through correctly during my testing. I am using real transactions for tiny amounts on test products rather than use the Sandbox.

Thanks
Peter