[exim] SMTP_MAX_SESSIONS

Hello,

I need to add this to Exim.conf so it is more compatible with Mailman:

SMTP_MAX_SESSIONS_PER_CONNECTION = 30

However, when I add this line the Exim service will no longer start until I
remove it again.

Is this statement valid, and if so what is the problem with it?

Thanks very much.

Best regards,

Adrian.