Article ID: 126179, created on Jul 14, 2015, last review on Jul 17, 2015

  • Applies to:
  • Plesk 12.0 for Linux


Dovecot cannot handle mail accounts with name containing "&". Maillog contains the following message

srv-host postfix/pipe[25339]: 9952F11F8910: to=<amp&test@domain.tld>, relay=plesk_virtual, delay=8421, delays=8420/0.07/0/0.21, dsn=4.2.1, status=deferred (Message can not be delivered at this time )


This is a software issue with internal ID #PPPM-3065 and it will be fixed in further Plesk updates.
& (ampersand) is absent in list of allowed characters in auth_username_chars


Create custom config file in /etc/dovecot/conf.d/ with the following content:

auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@'&

Search Words


ampersand in email address

mails to mailaddress containig & will not be deliviered (dovecot)

29d1e90fd304f01e6420fbe60f66f838 56797cefb1efc9130f7c48a7d1db0f0c a914db3fdc7a53ddcfd1b2db8f5a1b9c 2a5151f57629129e26ff206d171fbb5f e335d9adf7edffca6a8af8039031a4c7

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