Could this be a spamer's attempt to probe my server to relay capabilities?

Thanks in advance,

Hunter Schaeffer

-------------Begin log snippet--------------
05:21 20:22 SMTPD(049E01D8) [0.0.0.0] connect 66.187.133.80 port 3329
05:21 20:22 SMTPD(049E01D8) send error 10054
05:21 20:22 SMTPD(049E01D8) send error 10054
-------------End   log snippet--------------

Below is the results of a reverse DNS lookup:


Reverse DNS for 66.187.133.80 Generated by www.DNSstuff.com

Country: UNITED STATES

How I am searching:
Searching for 80.133.187.66.in-addr.arpa PTR at b.root-servers.net:  Got 
referral to DILL.ARIN.NET. (zone: 66.in-addr.arpa.)
Searching for 80.133.187.66.in-addr.arpa PTR at DILL.ARIN.NET.:  Got 
referral to NS2.HOSTREMOTE.NET. (zone: 133.187.66.in-addr.arpa.)
Searching for 80.133.187.66.in-addr.arpa PTR at NS2.HOSTREMOTE.NET.:  Timed 
out.  Trying again.
Searching for 80.133.187.66.in-addr.arpa PTR at NS2.HOSTREMOTE.NET.:  Timed 
out.  Trying again.
Searching for 80.133.187.66.in-addr.arpa PTR at NS2.HOSTREMOTE.NET.:  Timed 
out.  Trying again.
Searching for 80.133.187.66.in-addr.arpa PTR at NS2.HOSTREMOTE.NET.:  Timed 
out.  Trying again.
Searching for 80.133.187.66.in-addr.arpa PTR at 
NS2.HOSTREMOTE.NET.:  Reports that no PTR records exist.

Answer:
No PTR records exist for 66.187.133.80. [Neg TTL=600 seconds]

Details:
NS2.HOSTREMOTE.NET. (an authoritative nameserver for 
133.187.66.IN-ADDR.ARPA., which is in charge of the reverse DNS for 
66.187.133.80)
says that there are no PTR records for 66.187.133.80.

To get reverse DNS set up for 66.187.133.80, you need to speak to your ISP 
(or "bandwidth provider").  You could also
contact [EMAIL PROTECTED], who is in charge of the 
133.187.66.IN-ADDR.ARPA. zone.


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