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5.2 Why not to use an SQL database with ezmlm

The main disadvantages of the SQL version are that you need to be familiar with the SQL server, the binaries are quite a bit larger, and you are trusting your addresses to a large database program, rather than a small and easily audited set of ezmlm programs. Also, the SQL server becomes a single point of failure.

Ezmlm with SQL support continues to rely on qmail stability. If connection fails, ezmlm aborts with a temporary error causing redelivery at a later time point.