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"Failed to initialize resolver" on startup
  
   Wrong or corrupted "nameserver" entry/entries in zerotoaster.ini.
   If it still fails after your changes, try IP addresses instead
   of hostnames. Under W2K (Windows 2000) you should use IP addresses.

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Difference between "Restart Server (intern)" and "Restart Server (complete)"

   "Intern" releases all internal resources and restarts itself. This
   is the preferred method to re-read changes in your config.
   In GUI: File -> Restart Server (intern)
   Command line: restart.cmd/.bat
   
   "Complete" releases all internal resources, exit the software to
   the start batch and restart. This is the preferred method to deploy
   updates.
   In GUI: File -> Restart Server (complete)
   Command line: fullrestart.cmd/.bat
   
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Message "Cannot find a free instance for this request"

   It is just a warning that the messages can't be send in the first
   run (the remaining messages are queued and send after 30 seconds). 
   If you get these messages very often during normal operations, you 
   have to increase the number of FWD instances (if you need "just in 
   time" delivery). You can disable this message with 
   "postmaster_notify_outofservers = 0" in zerotoaster.ini if you like.

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Mailinglist software refuses to work with ZT, most mails are rejected 
with "Relaying denied"
   
   Some mailinglist software is using an empty SMTP "MAIL FROM" as the
   sender for each message. An empty "MAIL FROM" is valid for bounces
   but the receiver must be a user of your system. You can solve this
   issue in two ways:
   1) Force your listmanager to use a valid sender adresse
   2) Put the IP of the listmanger server into the "trusted_networks"
      line in zerotoaster.ini

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Which RBL Server should I use?

  It depends on your and your customer needs. There is no "One size
  fits it all" RBL. Thats why we allow different setups for each user.
  
  But I can tell you how we found our favourite RBL. We collected a fair
  amount of spam (20-30 mails) and looked into the header of each mail.
  At the end of each header there are entries like this:
  
  X-Routed-IP: 192.166.53.13 *
  X-Routed-IP: 168.5.219.128

  The entry marked with an asterisk (*) is the IP which was detected as 
  the first IP outside your POP3-fetchers, relays and gateways.
  
  Write down these IPs and go to an RBL query site.
  
  A good starting point is >> http://www.dnsstuff.com/tools/ip4r.ch?ip= <<
  
  Feed the IPs into the query tool and check which database(s) will detect
  your IPs as spammer IPs.

  Use the best (or the first 2-3 best) databases for you.

  As of 10th December 2003 we're using 

   DSBL         list.dsbl.org     127.0.0.2  90%
   Reynolds T1  t1.dnsbl.net.au   127.0.0.2  95%
   SpamCop      bl.spamcop.net    127.0.0.2  95%

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