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======Access Restrictions Internal Format======
VPOP3 internally stores service IP Access Restrictions in its settings database using the following format to encode the multiple entries

These are stored in the settings database as *ALLOWED*.DAT (using VPOP3SETTINGS GET *ALLOWED*.DAT will list them)

Each entry is a line, separated by a line feed (ASCII 10, \n) - without an associated carriage return

The first entry specifies whether the 'Use Global Access Restrictions if more restrictive' option is set (1) or not (0)

Subsequent entries each encode a line in the IP Access Restrictions rule list, with 7 fields, separated by | characters

  - Allow: 0 = block, 1 = allow
  - Type: 0 = special, 2 = IPv4, 23 = IPv6, 100 = GeoIP
  - IP Address in text form
  - IP Address Prefix. Or, if Type = 0, then 0 = 'Any', 1 = 'Local Networks', 2 = 'Routers'
  - Allow NoAuth: 0 = no, 1 = yes
  - List of user IDs if only specific users allowed, separated by tab (ASCII 9 \t)
  - Comment (optional)

=====Example=====
0
1|0||1|0||


The initial 0 means that "Use global access restrictions if more restrictive" is unchecked

Then
  - 1 = Allow
  - 0 = Special
  - <blank> = N/A
  - 1 = Local Networks (because field 2 is 'Special')
  - 0 = Don't allow unauthenticated access
  - <blank> = no specified users
  - <blank> = no comment

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