E-Mail Configuration in ASP.Net

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The below-listed is the current e-mail configuration. However, an error occurs; "Transaction failed. The server response was: 5.7.1 SMTP Authentication is required to send email."

Here are all of our mail settings:

1) Ports - POP is 110; IMAP is 143; SMTP (outgoing) is 587.
2) SSL should not be enabled.
3) You MUST have SMTP Authentication enabled, but do NOT enable Secure Password Authentication.
4) Incoming and outgoing server name must be mail.domain.extension (example: mail.domain.com).
5) The user name is your FULL email address.

XML

<?xml version="1.0"?>

<configuration>
  <appSettings>
    <add key="SMTPServer" value="mail.XXX.com"/>
    <add key="BCCEmail" value="info@XXX.com"/>
    <add key="TOEmail" value="info@XXX.com"/>
  </appSettings>
  <system.web>
    <compilation debug="true"/>

    <customErrors mode="Off" />

Posted 23-Aug-14 7:47am

Member 10835262

Updated 23-Aug-14 9:41am

Yvan Rodrigues

v4

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[no name] 23-Aug-14 13:59pm

"Authentication is required to send email" is pretty much self explanatory is it not?

Member 10835262 23-Aug-14 14:03pm

My apologies, this is new to me. May you please provide an example? Thank you for your anticipated response.

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Yvan Rodrigues · Answer 1 · 2014-08-23T09:47:00

First, very bad idea. What you are describing will send everyone's passwords over the wire in plaintext. Enable SSL (STARTTLS).

Don't worry about POP3 and IMAP -- they have nothing to do with mail delivery.

Other than that we can't help you. Obviously the application is getting some settings from appSettings but without sharing the part where the application actually sends messages (usually using System.Net.Mail.SmtpClient, we can't see if it is able to authenticate.