Hi Timo, "quota.c" calls "root->backend.v.init_limits(root)", but "quota_fs.c" initializes this with NULL. On AIX e.g. this results in core dumping imap with SIGILL. I've attached a (quick and dirty) patch. Ralf -- ______________________________________________________________________ Dipl.-Inform. (FH) Ralf Becker Rechenzentrum (r/ft) der FH Trier (Network|Mail|Web|Firewall) University of applied sciences Administrator Schneidershof, D-54293 Trier Mail: beckerr@fh-trier.de Fon: +49 651 8103 499 Web: http://www.fh-trier.de/~beckerr Fax: +49 651 8103 214 PubKey: http://www.fh-trier.de/~beckerr Crypto: GnuPG, S/MIME ______________________________________________________________________ Wenn Gott gewollt haette, dass E-Mail in HTML geschrieben wuerden, endeten Gebete traditionell mit </amen>. (Tom Listen) --- dovecot-1.2.5/src/plugins/quota/quota.c.org 2009-09-15 20:12:12.000000000 +0200 +++ dovecot-1.2.5/src/plugins/quota/quota.c 2009-09-15 20:12:27.000000000 +0200 @@ -444,7 +444,7 @@ bool found; if (!root->set->force_default_rule) { - if (root->backend.v.init_limits(root) < 0) + if (root->backend.v.init_limits && root->backend.v.init_limits(root) < 0) return -1; }