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<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<!--
* HostName host name used for banner, null = retrieve it from network settings
* ListenAddress: address to listen on, 0.0.0.0=any (default=127.0.0.1)
* ListenPort: port # to listen on (default=25 SMTP)
* ReceiveTimeOut timeout after which a read operation fails (and session is dropped)
the default is 8000, that is, 8 seconds, if the client doesn't send
in commands or data, it will receive a 4xx "timeout" message and
the connection will be dropped; lower the value on very busy boxes,
raise it in case you have a slow connection
* MaxSmtpErrors max number of accepted SMTP errors (invalid commands ...) after reaching
this limit, the connection will be dropped with an error message
* MaxSmtpNoop max number of "NOOP" commands accepted, same behaviour as for max errors
* MaxSmtpNoop max number of "VRFY/EXPN" commands accepted, same behaviour as for max errors
* MaxSmtpRcpt max number of "RCPT TO" commands accepted, same behaviour as for max errors
* MaxMessages max number of messages accepted in a single session (default=10)
* MaxSessions max number of parallel sessions; once reached, incoming connections will
be rejected (immediately disconnected) until the number of session doesn't
drop under this limit, this is useful to avoid being DDoS-ed by a flock of
bots issuing a huge number of connection to our box
* StoreData if true, the email envelope and DATA are stored into a temporary, unique
file, if DoTempFail is true, setting this value will cause the temp fail
to be sent out after the DATA has been received (otherwise it will be
sent out when receiving the DATA command, see also DoTempFail)
* StorePath path used to store the email data (as above), each message will be stored
into a file with a unique name, messages headers will the contain some
additional headers "X-FakeSMTP-..." containing the session and envelope
informations, the folder must be writable, it can be the same path used
for LogPath
* MaxDataSize max size for a mail message (headers and data) only used if StoreData
is enabled; in this case, a message bigger than MaxDataSize will cause
a 4xx "quota" tempfail message to be returned to the client
* LogPath path to store logfiles both related to general program operations and to
the sessions/emails; files are named using the current month # so you'll
have a max of 12 logfiles, older ones will be automatically overwritten
the folder must be writable, it can be the same path used for StorePath
* VerboseLogging if true, the logfile will also contain the command and replies, this is
useful when using the program to test a mail sending application or to
diagnose a mail issue (note: that the DATA part won't be logged)
* BannerDelay delay (milliseconds) before emitting the SMTP server initial "banner" this may
help to slowdown spamsending bots although rising the value too much may cause
problems since you may end up with a bunch of sessions waiting for the banner
for details see http://wiki.asrg.sp.am/wiki/Early_talker_detection
* ErrorDelay delay (milliseconds) to emit a response after an error, the delay is multiplied
by the errors count so, the more errors the higher the delay (up to max errors)
* DoTempFail if true, at or after the DATA command (see StoreData) the server will emit a
4xx tempfail message and drop the connection, this is useful if you want to
use the program to setup an "MX sandwich" (aka "nolisting")
* DoEarlyTalk if true, enables checking for the so called "early talkers" that is SMTP
senders which don't wait for the server banner or reply but keep sending
in commands/data; those clients are usually spambots and enabling this check
will reject them (checks are performed before both the banner and each reply
are sent out to the remote client)
* RWLproviders comma separated list of DNS whitelist providers against which the incoming
IP is checked; if listed, the blacklist checks will be skipped; set this to
null to disable this check
* RBLproviders comma separated list of DNS blacklist providers against which the incoming
IP is checked; if listed and if StoreData is disabled, the connection will
be dropped with a tempfail (4xx) error message, set this to null to disable
this check
* LocalDomains pathname of a text file containing the list of locally handled domains, one
on each line; if empty, all domains will be accepted, otherwise the program
will emit a "rely denied" error in case an "RCPT TO" targets a domain which
isn't included in this list
* LocalMailBoxes pathname of a text file containing the list of locall handled email addresses
one on each line; if empty all addresses will be accepted, otherwise the program
will emit an "invalid address" if an "RCPT TO" targets an address which isn't
included in this list
-->
<appSettings>
<add key="HostName" value=""/>
<add key="ListenAddress" value="127.0.0.1"/>
<add key="ListenPort" value="25"/>
<add key="ReceiveTimeOut" value="8000"/>
<add key="MaxSmtpErrors" value="4"/>
<add key="MaxSmtpNoop" value="7"/>
<add key="MaxSmtpVrfy" value="10"/>
<add key="MaxSmtpRcpt" value="100"/>
<add key="MaxMessages" value="10"/>
<add key="MaxSessions" value="16"/>
<add key="StoreData" value="True"/>
<add key="StorePath" value=""/>
<add key="MaxDataSize" value="2097152"/>
<add key="LogPath" value=""/>
<add key="VerboseLogging" value="False"/>
<add key="BannerDelay" value="1000"/>
<add key="ErrorDelay" value="500"/>
<add key="DoTempFail" value="False"/>
<add key="DoEarlyTalk" value="True"/>
<add key="RWLproviders" value="swl.spamhaus.org,iadb.isipp.com"/>
<add key="RBLproviders" value="zen.spamhaus.org,bb.barracudacentral.org,ix.dnsbl.manitu.net,bl.spamcop.net,combined.njabl.org"/>
<add key="LocalDomains" value=""/>
<add key="LocalMailBoxes" value=""/>
</appSettings>
</configuration>
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