New problem with emails - OTRS

[mic]

Hello.

Everything was OK and no one change anything but I have problems with sending emails via OTRS, again
My OTRS is running on Win7 Ultimate.

In system log I see this kind of errors:

[Tue Jul 1 09:00:13 2014][Error][Kernel::System::Email::SMTP::Send][122] Can't use from '': 5505.1.8 Sender address rejected
! Enable Net::SMTP debug for more info!

I can send administration notice (which is email) without any problems but automatically jobs (like sending notice for agent/notice for operator/automatically answer for customer) won't work

Please, help me...
BR, Michael.

[jojo]

your mailserver does not allow an empty sender. you can set an envelope from in Core::Sendmail or change mailserver setup

[mic]

jojo,

you are my Hero Today
thanks!

but why earlier everything was OK... hm.