sprint.net Email problems?

[Daniel Roesen <dr () cluenet de>]

Hi,

depending on the IP address space from where I'm trying to reach
the two MX for @sprint.net, I'm getting either:

- no TCP connection at all (Connection refused)
- a TCP session, but not even a SMTP greeting banner
- a SMTP session, but as response to RCPT TO a 550 Access denied

For the third case, doesn't seem to matter which email address I try
(did ipv6-support@, rrockell@ and postmaster@).

This is persistant now for over 12 hours...


Best regards,
Daniel