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I am a total newbie to all of this domain stuff.
But I am a relentless pursuer of knowledge.
I did a DNS lookup of the domain and found that many of Fastmails IP's are on a block list.
Is this a part of Greylisting or is there some problem going on with Fastmail that they do not want to fess up to ???
66.111.4.54
IP blocked by dnsbl.spfbl.net
66.111.4.53
IP blocked by dnsbl.spfbl.net
IP blocked by zen.spamhaus.org
IP blocked by xbl.spamhaus.org
in1-smtp.messagingengine.com 66.111.4.74
IP blocked by xbl.spamhaus.org
in1-smtp.messagingengine.com 66.111.4.72
IP blocked by dnsbl.spfbl.net
in1-smtp.messagingengine.com 66.111.4.70
IP blocked by dnsbl.spfbl.net
in2-smtp.messagingengine.com 64.147.123.52
IP blocked by zen.spamhaus.org
IP blocked by xbl.spamhaus.org
in1-smtp.messagingengine.com 66.111.4.73
IP blocked by dnsbl.spfbl.net
in2-smtp.messagingengine.com. 64.147.123.51
IP blocked by zen.spamhaus.org
in1-smtp.messagingengine.com 66.111.4.75
IP blocked by dnsbl.spfbl.net
in1-smtp.messagingengine.com 66.111.4.71
IP blocked by dnsbl.spfbl.net
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