myway.com continuing to block sonic.net messages

[http://dummy.us.eu.org/robert (Robert)]

I've included the header below.

Apparently, myway.com doesn't allow messages from sonic.net

Can this be fixed?

--- Forwarded mail from Mail Delivery Subsystem <http://www.b.mail.sonic.net/~MAILER-DAEMON>

From http://www.pop.sonic.net/~MAILER-DAEMON  Mon Nov  5 19:39:42 2007
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Date: Mon, 5 Nov 2007 19:37:41 -0800
From: Mail Delivery Subsystem <http://www.b.mail.sonic.net/~MAILER-DAEMON>
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To: <http://dummy.us.eu.org/robert>
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Content-Type: multipart/report; report-type=delivery-status;
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Subject: Returned mail: see transcript for details
Auto-Submitted: auto-generated (failure)
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--lA63RdMV030700.1194320261/b.mail.sonic.net

The original message was received at Mon, 5 Nov 2007 08:02:19 -0800
from 69-12-146-188.dsl.static.sonic.net [69.12.146.188]

   ----- The following addresses had permanent fatal errors -----
<http://www.myway.com/~369marnie>
    (reason: 554 5.7.1 Service unavailable; Client host [64.142.19.5] blocked 
    using blackholes.myway.com; Sender address rejected: Access denied Error: 
    WS-19)

   ----- Transcript of session follows -----
... while talking to mprdmxin2.myway.com.:
>>> DATA
<<< 554 5.7.1 Service unavailable; Client host [64.142.19.5] blocked using 
blackholes.myway.com; Sender address rejected: Access denied Error: WS-19
554 5.0.0 Service unavailable
<<< 554 5.5.1 Error: no valid recipients
>>> RSET
<<< 421 4.7.0 mprdmx8.nwk.myway.com Error: too many errors

--lA63RdMV030700.1194320261/b.mail.sonic.net
Content-Type: message/delivery-status

Reporting-MTA: dns; b.mail.sonic.net
Arrival-Date: Mon, 5 Nov 2007 08:02:19 -0800

Final-Recipient: RFC822; http://www.myway.com/~369marnie
Action: failed
Status: 5.7.1
Remote-MTA: DNS; mprdmxin2.myway.com
Diagnostic-Code: SMTP; 554 5.7.1 Service unavailable; Client host [64.142.19.5] 
blocked using blackholes.myway.com; Sender address rejected: Access denied 
Error: WS-19
Last-Attempt-Date: Mon, 5 Nov 2007 19:37:39 -0800

--lA63RdMV030700.1194320261/b.mail.sonic.net--