Dear list, I have tried to reply to the message from Jan Urlich three times and it was rejected those three times, because of the following error: "ntg-context@ntg.nl": SMTP error from remote server after RCPT command: host: mx-1.mf.surf.net 5.7.1 82.165.159.42: on real-time blacklist zen.spamhaus.org Sorry, but I cannot negotiate which servers or IP addresses my mail provider uses. I don’t know whether the rejection is exclusively related to mailbox.org or it will happen with all my replies to any message from the list. Is there any way to whitelist my address for the mailing list? Sorry for the problems, but I have already experienced this and I would like to fix it forever. Many thanks for your help, Pablo -- http://www.ousia.tk