Title: Error Sending Mail
Last modified: August 20, 2016

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# Error Sending Mail

 *  [John Doe](https://wordpress.org/support/users/borisvs/)
 * (@borisvs)
 * [13 years, 2 months ago](https://wordpress.org/support/topic/error-sending-mail/)
 * Hi,
 * When the plugin is trying to email me the backup, I’m getting this error:
 * Warning: preg_match() [function.preg-match]: Compilation failed: internal error:
   previously-checked referenced subpattern not found at offset 4246 in /home/xxx/
   domains/xxx/public_html/wp-content/plugins/backwpup/sdk/SwiftMailer/classes/Swift/
   Mime/Headers/MailboxHeader.php on line 350
    Swift Mailer: Address in mailbox 
   given [xxx@gmail.com] does not comply with RFC 2822, 3.6.2.Error while sending
   email!
 * Is this a bug in the plugin or something with my hosting? I’m using WordPress
   3.5.1 and BackWPup 3.0.4.
 * Thanks in advance!
 * [http://wordpress.org/extend/plugins/backwpup/](http://wordpress.org/extend/plugins/backwpup/)

The topic ‘Error Sending Mail’ is closed to new replies.

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## Tags

 * [mail](https://wordpress.org/support/topic-tag/mail/)

 * 0 replies
 * 1 participant
 * Last reply from: [John Doe](https://wordpress.org/support/users/borisvs/)
 * Last activity: [13 years, 2 months ago](https://wordpress.org/support/topic/error-sending-mail/)
 * Status: not resolved