First install of Xenforo Email issue with PathHeader

• Error I am seeing is below with my email address removed.
• 
  
• Swift_RfcComplianceException: Email to xxx@xxxx.com failed setup: Address set in PathHeader does not comply with addr-spec of RFC 2822.
• src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mime/Headers/PathHeader.php:138

I changed email options in setup from default to smtp but still get this error. Help please....

First install of Xenforo Email issue with PathHeader

source https://xfmaster.com/threads/first-install-of-xenforo-email-issue-with-pathheader.16019/