Like this for example - yes, not a formally defined abuse contact field, but they are so insistent that they should only receive spam reports at abuse@chello.pl Unfortunately - that address doesn't exist. If someone from Chello could please contact me about nigerians who keep abusing what is likely an open proxy at 89.70.30.128 I'd be obliged --srs (postmaster@lotuslive.com / AS27477 IBM Lotuslive) abuse@chello.pl SMTP error from remote mail server after RCPT TO:<abuse@chello.pl>: host smtp.upcpoczta.pl [213.46.255.2]: 550 5.1.1 <abuse@chello.pl> unknown recipient rejected route: 89.70.0.0/16 descr: UPC.pl origin: AS9141 remarks: Any abuse activities including, but not limited to spamming, remarks: hacking and intrusion attempts coming from chello.pl address remarks: space shall be reported ONLY to: remarks: remarks: abuse@chello.pl remarks: remarks: Any reports sent to any other e-mail addresses may be treated remarks: as SPAM itself and followed by legal actions remarks: against originator mnt-by: AS6830-MNT source: RIPE # Filtered -- Suresh Ramasubramanian (ops.lists@gmail.com)