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email:troubleshooting:error-numbers:421 [2015/01/23 15:30]
email:troubleshooting:error-numbers:421 [2015/02/04 08:39]
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 ====== SMTP Error 421 ====== ====== SMTP Error 421 ======
-Description: ​421421421421421421421421+Description: ​<​blockquote><​SERVER>​ Service not available, closing transmission channel</​blockquote>​
 ==== What does this mean? ==== ==== What does this mean? ====
-<​!AWESOME MEANING!>​+This is an unfortunately,​ open ended error. Most commonly this is in relation to the destination server not being "​reachable",​ however it may also mean that your sending mail server is not "​reachable"​. The latter of the two options is less common, unless a remote MX exchange is being used. The error message is also an indication that the message will continue being attempted for delivery.
 ==== How to fix SMTP Error 421 ==== ==== How to fix SMTP Error 421 ====
-<​!AWESOME FIX!>+If you are using a remote mail server for sending email, you'll want to ensure that it's functioning properly and connections to it are successful.  
 +If you are not using a remote mail server (or it's working properly) you'll want to check the destination server'​s availibilty. Check out the //Testing Remote SMTP / Mail Server Connections//​ article referenced at the end of this article.  
 +=== Related Articles === 
 === Similar SMTP Errors === === Similar SMTP Errors ===
-**[[email:​troubleshooting:​error-numbers:​421|# 421]]**+**[[email:​troubleshooting:​error-numbers:​111|# 111]]** **[[email:​troubleshooting:​error-numbers:​441|#​ 441]]**
email/troubleshooting/error-numbers/421.txt · Last modified: 2015/02/04 08:39 by dlevey