Istvan Kope wrote:
If you're sending from somewhere that has a dynamic IP (your house, cable modem, DSL, etc.) then zen.spamhaus is probably blocking it. Remove that entry from your blacklists file and try.A have a Qmailtoaster installation on Centos 4.3.It worked excellent for a couple of months but since yesterday clients started to fail sending messages with Thunderbird giving the following message:Sending of message failed.The message could not be sent beacuse connecting to SMTP server mail.hidraulica.ro failed. The server may be unavailable or refusing SMTP connections.I didn't make any changes to the server. There is no problem with receiving messages. I don't know what to look for in the log. Since now I don't see in the log any error, or failure or anything...
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