NAME

Mail::MIMEDefang - email filtering milter

DESCRIPTION

Mail::MIMEDefang is a framework for filtering e-mail. It uses Sendmail\'s Milter API, some C glue code, and some Perl code to let you write high-performance mail filters in Perl.

People use MIMEDefang to:

Block viruses Block or tag spam Remove HTML mail parts Add boilerplate disclaimers to outgoing mail Remove or alter attachments Replace attachments with URLs Implement sophisticated access controls.

You\'re limited only by your imagination. If you can think of it and code it in Perl, you can do it with MIMEDefang.

METHODS

init_globals: Initialize global variables used across MIMEDefang instance and filter.
print_and_flush(text): Prints to stdout and flush buffer.
md_openlog(tag, facility): Initialize e syslog object using Sys::Syslog or Unix::Syslog as appropriate.
md_syslog(facility, msg): Prints a message to syslog (3) using the specified facility
md_graphdefang_log: This is called to log events that occur during mimedefang processing. It should be called from mimedefang-filter with appropriate event names and values. Possible examples: md_graphdefang_log(virus,$VirusName,$filename); md_graphdefang_log(spam,$hits); md_graphdefang_log(bad_filename,$filename,$extension); If you need to log UTF-8 strings you can call the sub as: md_graphdefang_log('spam',$hits, undef, 1)
detect_and_load_perl_modules: Automatically detect and load Perl modules needed for some features like SpamAssassin, rbl checks, zip file listing and HTML parsing.
detect_antivirus_support: Check if antivirus support should be loaded by looking at %Features
init_status_tag: Open the status file descriptor
set_status_tag(depth, tag): Sets the status tag for this worker inside the multiplexor.
push_status_tag(tag): Updates status tag inside multiplexor and pushes onto stack.
pop_status_tag: Pops previous status of stack and sets tag in multiplexor.
percent_encode(str): Encode a string with unsafe chars as %XY where X and Y are hex digits.
percent_encode_for_graphdefang(str): Encode a string with unsafe chars as %XY where X and Y are hex digits. Quotes or spaces are not encoded but commas are encoded.
percent_decode(str): Decode a string previously encoded by percent_encode().
write_result_line ( $cmd, @args ): Writes a result line to the RESULTS file. $cmd should be a one-letter command for the RESULTS file @args are the arguments for $cmd, if any. They will be percent_encode()'ed before being written to the file. Returns 0 or 1 and an optional warning message.
signal_unchanged: Tells mimedefang C program message has not been altered.
signal_changed: Tells mimedefang C program message has been altered.
in_message_context(name): Returns 1 if we are processing a message; 0 otherwise.
in_filter_wrapup(name): Returns 1 if we are not in filter wrapup; 0 otherwise.
in_filter_context: Returns 1 if we are inside filter or filter_multipart, 0 otherwise.
in_filter_end(name): Returns 1 if we are inside filter_end 0 otherwise.
send_quarantine_notifications: Sends quarantine notification message, if anything was quarantined.
signal_complete: Tells mimedefang C program Perl filter has finished successfully. Also mails any quarantine notifications and sender notifications.
send_mail(fromAddr, fromFull, recipient, body, deliverymode): Sends a mail message using Sendmail. Invokes Sendmail without involving the shell, so that shell metacharacters won't cause security problems. Deliverimode parameter is the optional sendmail delivery mode arg (default -odd).
send_admin_mail(subject, body): Sends a mail message to the administrator
send_multipart_mail(fromAddr, fromName, recipient, subject, body_text, body_html, extra_headers): Sends a multipart mail message using Sendmail. Invokes Sendmail without involving the shell, so that shell metacharacters won't cause security problems.
read_commands_file(): This function should only be called from filter_sender and filter_recipient. This will read the COMMANDS file (as described in mimedefang-protocol(7), and will fill or update the following global variables: $Sender, @Recipients, %RecipientMailers, $RelayAddr, $RealRelayAddr, $RelayHostname, $RealRelayHostname, $QueueID, $Helo, %SendmailMacros. If you do not call read_commands_file, then the only information available in filter_sender and filter_recipient is that which is passed as an argument to the function.

NAME

DESCRIPTION

METHODS

SEE ALSO