Am 30.11.2012 11:44, schrieb Tomas Macek: > I cannot apply firewall rules on 587, because our clients travel with > their notebooks and still want to send their emails through our mailserver.
use fail2ban etc for blocking dynamic, brute force attacks to submission, normally this never matched on legal clients cause they know their passwords and submission should used only, with password auth and tls , if afraid for dummy users, choose low blocking time Best Regards MfG Robert Schetterer -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer Aufsichtsratsvorsitzender: Joerg Heidrich
