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This is a post of the actual message. Could you please post the actual error? And if you need to post emails in the troubleshooting process, please sanitize them so that they can't be used for data collection.
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This is a post of the actual message. Could you please post the actual error? And if you need to post emails in the troubleshooting process, please sanitize them so that they can't be used for data collection.

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What i would like to know is how are these emails been sent to user. why is this happening? is it users email or is it the wifi that the user is using? this is the only user using a flashnet from vodafone that is facing this issue
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What i would like to know is how are these emails been sent to user. why is this happening? is it users email or is it the wifi that the user is using? this is the only user using a flashnet from vodafone that is facing this issue

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how can i change the attachment???
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<div class="content wysiwyg-content">
User get the error message attached<br />
<br />
The laptop has been formatted but the issue still exists. It happens only to this user<br />
<a href="https://filedb.experts-exchange.com/incoming/2017/02_w07/1144282/garysemailissue.txt" target="_blank" class="file-inline" title="messages received in users email box (4.6 MB)"><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>garysemailissue.txt</a>
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garysemailissue.txt

User get the error message attached

The laptop has been formatted but the issue still exists. It happens only to this user

Mdaemon user using wifi for email

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

Email Protocols

The Email Laundry combines its industry leading cloud e-mail reputation scoring with sophisticated dynamic malware analysis, real-time threat intelligence and automated threat response to enable organizations to more effectively detect and block these both targeted and general attacks.

The Email Laundry

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

Wireless networking is anything related to the transfer of data between two (or more) devices without the use of a physical connection, ranging from getting advice on a new Bluetooth headset to configuring sophisticated enterprise level networks.

Wireless Networking

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.