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The Register of Known Spam Operations
David Callender / The Powerhouse Network

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David Callender / The Powerhouse Network Index

Country: United States
State: CA
David Callender specializes in finding dead or dying companies, offering to "manage" their IP space to bring in lots of "customers" who turn out to be spammers.

David Callender / The Powerhouse Network SBL Listings History
Current SBL Listings
Archived SBL Listings

Emails from David and Naomi Callender

Here's an email sent to Spamhaus from David Callender claiming he doesn't know his partner Sanan Phutrakul:


Date: Wed, 3 Dec 2014 03:34:17 -0800
From: David Callender <>


Per my communications with one of my providers, InterNap, they suggested I contact you directly.

As I told Internap:

1. my customers are not spammers, and never have been
2. I have never heard of this Sanan Sasha Phutrakul nor have I ever done business with anyone by that name
3. My customers are running their infrastructure on these IPs, including their mail and DNS server IPs. They are blocked and effectively offline.
4. This listing refers to a single domain name hosted on IP This block is part of that we have assigned to a customer on a VPS for dns services.

I do understand this listing, can you provide any additional information. We monitor all mail, including port 25/110, and have seen no significant (or any rise) in the email going out or any email going out on these IPs.

Integra Solutions


We pointed out to him that it seems strange that he does not know Sanan Phutrakul, as they registered several companies together:

Omni Cap Distribution Company Ltd. was established 7 years ago and is located at 1307/2 Square on October 14, Praha 5, 15000. The Statutory Body has two members: David Bennett Callender and Sanan Sasha Phutrakul who act for the company: Each of the managers are authorized to act on behalf of the company separately . Attention! The company in December 11, 2012 called Bohemia sro Beads and changed once the seat.

Company "Gigalynx Ltd." was founded 2 years ago in Prague.

In her leadership for functioning replaced by 3 people. Currently the company's own Sanan Sasha Phutrakul (38), Paul Francis Hackett (41), David Bennett Callender (46).


Date: Wed, 3 Dec 2014 06:12:46 -0800
Subject: Re:
From: David Callender <>

So, yes, I known Sanan and we work together in several companies, but that does not mean Integra Solutions hosts spammers or spam operators.


And here's an email sent to Spamhaus from Naomi Sullivan-Callender claiming that she doesn't know her husband David Callender:


From: <>
Subject: SBL275758 2605:e880::/32
Date: Mon, 30 Nov 2015 05:34:15 -0700

Hello, Doing a year-end review on leased IP space, I noticed that IP space Allocated to OPSYLON LLC was both listed by you ro organization, placed under a ROKSO-listed individual, and assoaciated with several entities. Not sure where you are getting your information, but OPSYLON LLC is a company wholly-owned by myself and I leased the IP allocations I received from ARIN and RIPE to customers, such as Jake Bostrom. I am not associated with Sanan Phutrakul and David Callender is nor ever has worked for this company. While I respect you have a job to do, it is expected that you will follow your policies. I received no information regarding any listing. Please re-review my IP allocations and you will see that they clearly have no email originating from them nor any other type of traffic that violates any policies.

Naomi Sullivan


Note: "Jake Bostrom" is a fake name used by one of Callender's main customers (or possibly only customer remaining these days), Blackstar Marketing.

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