How do I fix SMTP connection error?

How do I fix SMTP connection error?

How to fix issues with sending email (SMTP)

  1. Open the settings for your email in the application or device you are using.
  2. Locate the outgoing SMTP server and its settings.
  3. Check the current outgoing port and change it to 26 or 587.
  4. Make sure any username and password fields are filled in if shown.
  5. Save changes and test.

How do you resolve the SMTP server requires a secure connection or the client was not authenticated the server response was 5.7 0 authentication required?

To summarize, I had to take into consideration the following points:

  1. Use instead of
  2. Use port 587.
  3. Set client. UseDefaultCredentials = false; before setting credentials.
  4. Turn on the Access for less secure apps.
  5. Set client. EnableSsl = true;

What is SMTP authentication error?

If your mail server (also known as the SMTP server) rejects the user name and password, an Authentication Failed error will result. You will not be able to send any email until this problem is resolved, although it may not affect the ability to receive email.

Can’t connect to SMTP?

And here’s a checklist to understand why you’re unable to send emails and troubleshoot any major problem:

  1. Check your internet connection. Yup.
  2. Check your SMTP server details.
  3. Verify all usernames and passwords.
  4. Check your SMTP server connection.
  5. Change your SMTP port.
  6. Control your antivirus or firewall settings.

How do I read SMTP logs?

Open Start > Programs > Administrative Tools > Internet Information Service (IIS) Manager. Right click “Default SMTP Virtual Server” and choose “Properties”. Check “Enable logging”. You can check the SMTP log files at C:\WINDOWS\system32\LogFiles\SMTPSVC1.

What are SMTP codes?

General SMTP status codes SMTP codes that start with 2 and 3 are general status messages that are sent in reply to requests from the sending server. They do not indicate errors in the mail delivery but are used as prompts in the exchange between the mail servers. 214 Help message.

How do I enable SMTP authentication in Outlook?

Start Outlook.

  1. On the Tools menu, click Account Settings.
  2. Select the email account from the list and click Change.
  3. On the Change E-mail Settings window, click More Settings.
  4. Click the Outgoing Server tab and check the My outgoing server (SMTP) requires authentication option.

How do I fix server response was 5.7 0 Authentication required?

Under Security, scroll down and enable access for less secure apps. This setting is required to enable SMTP, POP or IMAP access. NB: Even if you have checked this before, check it now because Google disables this access if it is not in regular use.

How do I authenticate SMTP?

How to configure SMTP authentication

  1. Right-click on the context menu of your e-mail account and click on “Settings”
  2. Navigate to “Outgoing server (SMTP)” select your mail server and click “Edit”
  3. Activate the option “Use username and password” and enter your e-mail address.
  4. Confirm the settings with “OK”

How to configure SMTP Authentication?

How to Configure SMTP Authentication 1 Right-click on the context menu of your e-mail account and click on ” Settings “. 2 Navigate to ” Outgoing server (SMTP) ” select your mail server and click ” Edit “. 3 Activate the option ” Use username and password” and enter your e-mail address. 4 Confirm the settings with ” OK “. See More….

How do I verify that I’ve enabled SMTP Authentication for a mailbox?

To verify that you’ve enabled or disabled SMTP AUTH for a specific mailbox, do any of the following steps: Individual mailboxes in the Microsoft 365 admin center: Go to Users > Active users > select the user > click Mail > click Manage email apps and verify the value of Authenticated SMTP (checked = enabled, unchecked = disabled).

How to test SMTP client submission for Office 365 server?

5. to test if the office 365 server is working properly for this account, we can use outlook client in windows to test smtp client submission. please try the steps below: b. click manual setup or additional server types. c. choose pop or imap button. f. click ok to save.

How do I enable/disable SMTP AUTH on specific mailboxes?

The per-mailbox setting to enable (or disable) SMTP AUTH is available in the Microsoft 365 admin center or Exchange Online PowerShell. Use the Microsoft 365 admin center to enable or disable SMTP AUTH on specific mailboxes Open the Microsoft 365 admin center and go to Users > Active users.

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