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Error " Pre-greeting traffic" and blacklisted IP address
It may well be that we have blacklisted your IP address because of " Pre-greeting traffic"; spamming software and viruses that connect to our mail servers do not expect the standard response "220 mta-gw2.infomaniak.ch ESMTP" to send mail data directly; our servers identify this data transmission before protocol set up is completed and thus blacklists the source IP address.
Therefore you need to:
- configure your mail program or mail server so that it matches the RFC's for mail exchange and so that it expects the response from our server before sending data (an email software with standard configuration does it automatically)
- Check that no other software which are capable of trying to send emails through our servers for example for event alarms as well as spyware software or desktops infested with viruses.
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