# Test Mail Works but Campaign mail is not sent

**URL:** <https://forum.mautic.org/t/test-mail-works-but-campaign-mail-is-not-sent/6069>\
**Category:** Product Support\
**Created:** [April 5, 2016, 11:51am UTC](https://forum.mautic.org/t/test-mail-works-but-campaign-mail-is-not-sent/6069 "2016-04-05T11:51:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![vijayhrdm](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/vijayhrdm/32/1575_2.png) [@vijayhrdm](https://forum.mautic.org/u/vijayhrdm)\
**Post date:** [April 5, 2016, 11:51am UTC](https://forum.mautic.org/t/test-mail-works-but-campaign-mail-is-not-sent/6069/1 "2016-04-05T11:51:00Z")

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I have queued 10000+ emails for sending in batches of 50.  
  
I see the messages in ‘spool’ directory, but somehow, messages are not being sent. There is no error at apache error log.  
  
I get this error from Mautic log file :  
  
2016-04-05 12:30:34] mautic.ERROR: Swift\_TransportException: Expected response code 250 but got code “421”, with message "421 4.7.0 \<[my-email-host.com](http://my-email-host.com) Error:$Error: too many errors " (uncaught exception) at /var/www/html/mautic/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php line 383

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<div class="post-metadata">

**Author:** ![vijayhrdm](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/vijayhrdm/32/1575_2.png) [@vijayhrdm](https://forum.mautic.org/u/vijayhrdm)\
**Post date:** [April 5, 2016, 11:51am UTC](https://forum.mautic.org/t/test-mail-works-but-campaign-mail-is-not-sent/6069/2 "2016-04-05T11:51:01Z")

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I have queued 10000+ emails for sending in batches of 50.  
I see the messages in ‘spool’ directory, but somehow, messages are not being sent. There is no error at apache error log.  
I get this error from Mautic log file :  
2016-04-05 12:30:34] mautic.ERROR: Swift\_TransportException: Expected response code 250 but got code “421”, with message "421 4.7.0 \<[my-email-host.com](http://my-email-host.com) Error:$Error: too many errors " (uncaught exception) at /var/www/html/mautic/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php line 383

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<div class="post-metadata">

**Author:** ![jaypatel5213](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/jaypatel5213/32/4612_2.png) [@jaypatel5213](https://forum.mautic.org/u/jaypatel5213)\
**Post date:** [March 15, 2021, 10:39am UTC](https://forum.mautic.org/t/test-mail-works-but-campaign-mail-is-not-sent/6069/3 "2021-03-15T10:39:51Z")

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> [@Mail not send on campaign](https://forum.mautic.org/t/mail-not-send-on-campaign/18561/6):
>
> Sorry mam i can’t understand this logs. Please pray me.