On Feb 3, 12:09 pm, Marc wrote:

> I've some trouble with exim4. I always get the error message: SMTP error
> from remote mail server after MAIL FROM:... 530 Authentication required.

Your question is not clear, what is the situation exactly?

1. Your client sofware can't send mails through your server? or

2. Your server can't deliver mails to another server? or

3. Your server can't relay mails through another server (smart relay)?

Since you send this to the exim list I assume you have a server
running exim, if that server is refusing relaying mail to your clients
(point 1), you probably did not configure relay_from_hosts, something
like:

hostlist relay_from_hosts = 127.0.0.1:192.168.10.0/24

But the problem could be something else, you have to check your
configuration (it is very well documented on the comments that
surround the options); look mostly at the top of the file.

HTH
--
René Berber