Answers.Body: <p>My comment above notwithstanding, there is a possibility that this isn't a mail server issue.</p>
  
  <p>If you recently upgraded to a newer version of PHP, you may have gone from a version that uses <em>mcrypt</em> to encrypt the outgoing mail password to one that doesn't.  To fix this, go to <strong>Administer menu » System Settings » Outbound Mail</strong> and re-enter your SMTP password and save.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-01-10T00:41:57.120Z
Answers.LastActivityDate: 2019-01-10T00:41:57.120Z
Answers.UserDisplayName: Jon G - Megaphone Tech
Body: <p>SMTP settings are checked (with user@domain as login) and <em>Track replies using VERP in Reply-To header</em> is disabled (it worked before).<br>
  How come a generated email adress name is used as login, thus preventing CiviMAIL to send a test mail?<br>
  Drupal 7.61 CiviCRM 4.7.30  </p>
  
  <blockquote>
    <p>Jan 09 07:00:10  [info] Ignoring exception thrown by nullHandler:<br>
    10005, Failed to add recipient: <em>user</em>@<em>domain</em><br>
    [SMTP: Invalid response code received from SMTP server while sending email.<br>
    This is often caused by a misconfiguration in Outbound Email settings.<br>
    Please verify the settings at<br>
    Administer CiviCRM >> Global Settings >> Outbound Email (SMTP).<br>
    (code: 550, response: Verification failed for<br>
    &lt; b.1223.8100.d34261f00e3242ab@<em>domain</em>><br>
    This email address does not exist. Dit e-mail adres bestaat niet.
    Sender verify failed)]</p>
  </blockquote>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-01-10T00:40:24.393Z
Comments.Text: This looks like a change in your SMTP server.  I would show this error to whomever runs the mail server, they probably made a recent change that could cause this.
Comments.UserDisplayName: Jon G - Megaphone Tech
Tags: <civimail>
Title: SMTP Verification failed
ThreadText: # SMTP Verification failed
  
  (Asked by: username_0 on 2019-01-09)
  
  SMTP settings are checked (with user@domain as login) and *Track replies using VERP in Reply-To header* is disabled (it worked before).  
  How come a generated email adress name is used as login, thus preventing CiviMAIL to send a test mail?  
  Drupal 7.61 CiviCRM 4.7.30
  
  > Jan 09 07:00:10 [info] Ignoring exception thrown by nullHandler:  
  > 10005, Failed to add recipient: *user*@*domain*  
  > [SMTP: Invalid response code received from SMTP server while sending email.  
  > This is often caused by a misconfiguration in Outbound Email settings.  
  > Please verify the settings at  
  > Administer CiviCRM >> Global Settings >> Outbound Email (SMTP).  
  > (code: 550, response: Verification failed for  
  > < b.1223.8100.d34261f00e3242ab@*domain*>  
  > This email address does not exist. Dit e-mail adres bestaat niet.
  > Sender verify failed)]
  
  **Tags:** civimail
  
  > **Comments:**
  > **username_1**: This looks like a change in your SMTP server.  I would show this error to whomever runs the mail server, they probably made a recent change that could cause this.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2019-01-10. Score: 1
  
  My comment above notwithstanding, there is a possibility that this isn't a mail server issue.
  
  If you recently upgraded to a newer version of PHP, you may have gone from a version that uses *mcrypt* to encrypt the outgoing mail password to one that doesn't. To fix this, go to **Administer menu » System Settings » Outbound Mail** and re-enter your SMTP password and save.
  
  
  ---
  
  