postfix and mailscanner

Maarten mailinglists at
Wed Dec 13 22:33:45 UTC 2017

Don't want to start a flame war here, but just a question, why does advise against using mailscanner? Saw the following on the
postfix website:

mailscanner: system, works with Postfix and other MTAs. WARNING: This
software uses unsupported methods to manipulate Postfix queue files
directly. This will result in corruption or loss of mail. The
mailscanner authors have sofar refused to discuss a proper access API or

When reading through mailinglists it seems that some mails can get lost
as in how mailscanner handles mail from the postfix mailqueue, and that
it's safer to use one of the virus/spam/content filters that that uses
the SMTP proxy interface or the Milter Interface. I wouldn't know if
this is true or how to know if any mails every got lost(is there a way
to know of having lost mails), but have there ever been talks between
postfix devs and mailscanner devs about this?

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