This "rewaddr" MountOption can be used in MOUNT parameter both for NNTP
and HTTP DeleGate.
To suppress the rewriting of mail addresses for specific addresses or domains,
specify "nomapemail" option of NNTPCONF like this:
An authentication key for each poster is required to control anonymization.
The key can be sent automatically via mail, or got with "-Fauthkey" command:
delegated -Fauthkey firstname.lastname@example.org
Each key is encrypted with a passphrase, of which default value is an empty
string. It should be changed to a non-default value with the AUTH=pass
parameter for each DeleGate server or -Fauthkey command: