Article ID: 121799, created on May 29, 2014, last review on Jun 10, 2016

  • Applies to:
  • Plesk 12.0 for Linux
  • Plesk 11.0 for Linux
  • Plesk 11.5 for Linux


Creating domain alias is failing with the error below:

PHP Warning: array_merge() [function.array-merge]: Argument #2 is not an array
Line: 70
File: /opt/psa/admin/plib/spamfilter/GreyListManager.php
Stack Trace:
#0 Smb_Exception_Syntax::handleError(2, array_merge() [function.array-merge]: Argument #2 is not an array, /opt/psa/admin/plib/spamfilter/GreyListManager.php, 70, Array ([action] = disable-greylisting,[data] = Array ([0] =,[stdInList] = Array (),[domainNames] = domain.tld))
#1 array_merge(Array (), called at [/opt/psa/admin/plib/spamfilter/GreyListManager.php:70]
#2 GreyListManager-_processDomainBatch(disable-greylisting, Array ([0] = called at [/opt/psa/admin/plib/spamfilter/GreyListManager.php:43]


Grey listing spam protection is not enabled.

This is Plesk internal issue with ID #PPPM-759 which was fixed in Plesk 12.0.18 MU#6


Apply the latest Plesk micro-updates or upgrade to the latest Plesk version.


Enable the "Switch on greylisting spam protection for all mail accounts under this domain" option from the mail settings of the domain.

Search Words

Weekly DNS problem

Argument #2 is not an array

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