> The following address(es) have yet to be delivered:
>   [email protected]:*Too many "Received" headers*  - suspected mail loop
> [...]
>       1:*Is there a tunable somewhere?*

received_headers_max

>       2:*Is the current default reasonable?*

That's hard to answer. The following is set on our servers:

    $ exim -bP received_headers_max
    received_headers_max = 50

In very rare cases, this limit is also reached. Without exception, however,
it is spam where someone has overdone it with the header forgery.

Heiko

Heiko Schlichting                Freie Universität Berlin
[email protected]   Zentraleinrichtung für Datenverarbeitung
Telefon +49 30 838-54327         Fabeckstraße 32
Telefax +49 30 838454327         14195 Berlin

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