Yes Ted, I was thinking about the same but I'm afraid about more spam... Benny - blocked is IP address (usually whole range of IP addresses). My client uses a mail provider whose almost all IP addresses are very often blacklisted (I checked it via http://mxtoolbox.com/). But my client doesn't send spam, he just uses affected SMTP server (what I know, his mail provider is his ISP). Therefore I can't receive his email. I know that it is problem of sender's mail provider, but I would like to resolve it on my side if it's possible...
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