In my old hosting provider I have a server without Plesk, and never have this problem before.
the +5000 destination address are in the BCC field of Mozilla Thunderbird.
I think in the e-mail not have a lot of "Content-type:"
How increase message header limit for psa-pc-remote?
if...
Hi,
I change hosting provider, and now I have a problem to send newsletter to +5000 destination address.
in /usr/local/psa/var/log/maillog I found:
Nov 28 18:43:38 host /usr/lib/plesk-9.0/psa-pc-remote[1849]: Message header limit (2000) exceeded. Probably malformed message or spam...