domain_for_unqualified_sender_address — configure a domain which will be used to substitute for unqualified sender addresses
domain_for_unqualified_sender_address = "example.com"
domain_for_unqualified_sender_address will rewrite the envelope address internally, although the original "MAIL FROM:" is still available from Sieve during all rcptto and data phases, using
vctx mailfrom_string. The trace headers, however, will reflect the original "MAIL FROM" string. NOTE that the "FROM:" header in the e-mail is never rewritten.
domain_for_unqualified_sender_address is valid in either a global scope (for a single fallback domain for all unqualified addresses) or can be set in a Pathway scope (for specific fallback domains for any number of specific domains). The usual fallback semantics apply.
domain_for_unqualified_sender_address is valid in a pathway, pathway_group, listener, and global scopes.