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Great, thanks for your comment!
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All the big mailers, including MailChimp and ConstantContact, work the same way. &nbsp;At least in CC, every time I add a name, I have to agree that the person wants to receive my email.<br />
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I expect that the big mailers work closely with Spamhaus and others such that if they do receive complaints they are quickly rectified.
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I have a user who wants to use Mailchimp to send newsletters to their list contacts. &nbsp;Although I see emails would be originating from Mailchimp’s servers, they would actually be shown as originating from our domain (with the help of SPF and DKIM records). &nbsp;<br />
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In view of this, could this potentially affect and risk the reputation of our domain and/or own mail server in a blacklist scenario? &nbsp;Or would a potential blacklist be isolated solely to the IP addresses of the Mailchimp servers...
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I have a user who wants to use Mailchimp to send newsletters to their list contacts.  Although I see emails would be originating from Mailchimp’s servers, they would actually be shown as originating from our domain (with the help of SPF and DKIM records).  

In view of this, could this potentially affect and risk the reputation of our domain and/or own mail server in a blacklist scenario?  Or would a potential blacklist be isolated solely to the IP addresses of the Mailchimp servers...

All the big mailers, including MailChimp and ConstantContact, work the same way.  At least in CC, every time I add a name, I have to agree that the person wants to receive my email.

I expect that the big mailers work closely with Spamhaus and others such that if they do receive complaints they are quickly rectified.

Risks involved when using Mailchimp (or any other email marketing service)?

An email client, email reader or more formally mail user agent (MUA) is a computer program in the category of groupware environments used to access and manage a user's email. A web application that provides message management, composition, and reception functions may internally act as an email client; as a whole, it is commonly referred to as webmail. Likewise, email client may be referred to a piece of computer hardware or software whose primary or most visible role is to work as an email client. Email clients can also have other systems, like calendars, notes and contact managers.

Email Clients

Mailchimp is an email marketing solution to manage subscribers, send emails, and track results. Mailchimp offers various integrations across other platforms.

Mailchimp

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

Various techniques are used to prevent email spam (unsolicited bulk email). No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email (false positives) vs. not rejecting all spam (false negatives) - and the associated costs in time and effort. Anti-spam techniques can be broken into four broad categories: those that require actions by individuals, those that can be automated by email administrators, those that can be automated by email senders and those employed by researchers and law enforcement officials.