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Im not sure how to look at SMTP logs, but I have one attached. My client store246mgr@dkintl.com is complaining they are not receiving emails submitted from us (customer_service@accurate<wbr />background<wbr />.com). From what i was told a 250 code represent that the email was submitted just fine from our side. However, I am not sure about the rest of the message in the log (attached). Can someone please tell me if the problem is on our end or the recipient (dkintl.com) by looking at this log?<br />
<a href="https://filedb.experts-exchange.com/incoming/2013/10_w43/684560/dkintl-logs-for-10-23.xlsx" target="_blank" class="file-inline" title="dkintl (12 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>dkintl-logs-for-10-23.xlsx</a>
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dkintl-logs-for-10-23.xlsx

Im not sure how to look at SMTP logs, but I have one attached. My client store246mgr@dkintl.com is complaining they are not receiving emails submitted from us (customer_service@accuratebackground.com). From what i was told a 250 code represent that the email was submitted just fine from our side. However, I am not sure about the rest of the message in the log (attached). Can someone please tell me if the problem is on our end or the recipient (dkintl.com) by looking at this log?

What does this SMTP log tell me?

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

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.