FWIW we prefer SLES. YaST takes some getting used to I agree, and SuSE has its quirks, but we have had good success using SLES to host a variety of apps, including Zimbra. We have also had good success with RHEL too.
It's clear from at least one of the bugs that Zimbra do not test as much on SLES as they do on RHEL; the log rotation bug on SLES 10 was particularly annoying because if a test SLES box had been kept up overnight the bug would have manifested itself straightaway.
But considering that Zimbra brings all its own pre-configured apps (Postfix, MySQL, Amavis, etc.) to the table, the OS plays a much more minor role with Zimbra than with other apps.
Hope that helps,
Mark
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___________________________________ L. Mark Stone, CIO "Uptime. All the time."
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