# Error sending emails after upgrading Mautic to v2.14.0

**URL:** <https://forum.mautic.org/t/error-sending-emails-after-upgrading-mautic-to-v2-14-0/10699>\
**Category:** Product Support\
**Created:** [August 14, 2018, 4:02pm UTC](https://forum.mautic.org/t/error-sending-emails-after-upgrading-mautic-to-v2-14-0/10699 "2018-08-14T16:02:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![carloscaro](https://avatars.discourse-cdn.com/v4/letter/c/57b2e6/32.png) [@carloscaro](https://forum.mautic.org/u/carloscaro)\
**Post date:** [August 14, 2018, 4:02pm UTC](https://forum.mautic.org/t/error-sending-emails-after-upgrading-mautic-to-v2-14-0/10699/1 "2018-08-14T16:02:34Z")

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After we upgraded Mautic to v2.14.0, the `mautic:emails:send` command started to report this error message:

`mautic.NOTICE: Symfony\Component\Debug\Exception\FatalThrowableError: Type error: Argument 1 passed to Swift_Transport_SendmailTransport::send() must implement interface Swift_Mime_Message, boolean given, called in /var/www/mautic/vendor/swiftmailer/swiftmailer/lib/classes/Swift/FileSpool.php on line 169 (uncaught exception) at /var/www/mautic/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/SendmailTransport.php line 100 while running console command mautic:emails:send [] []`

The messages are getting created in the “queue” … spool/default folder, but they are not getting sent … we are experimenting an issue as well with MySQL after the upgrade; it’s working slower and the MySQL process is using more CPU.

What could be the problem?

Thanks, Carlos.

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**Author:** ![silavapi](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/silavapi/32/7424_2.png) [@silavapi](https://forum.mautic.org/u/silavapi)\
**Post date:** [October 17, 2019, 4:33pm UTC](https://forum.mautic.org/t/error-sending-emails-after-upgrading-mautic-to-v2-14-0/10699/2 "2019-10-17T16:33:29Z")

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