+recptypes *validate_recipients(const char *recipients,
+ const char *RemoteIdentifier,
+ int Flags);
+
+void free_recipients(recptypes *);
+
+
+void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name);
+char *rfc822_fetch_field(const char *rfc822, const char *fieldname);
+void sanitize_truncated_recipient(char *str);
+char *qp_encode_email_addrs(char *source);
+int alias (char *name);
+
+
+int IsDirectory(char *addr, int allow_masq_domains);
+void CtdlDirectoryInit(void);
+int CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr);
+int CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr);
+int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen);
+struct CtdlMessage *convert_internet_message(char *rfc822);
+struct CtdlMessage *convert_internet_message_buf(StrBuf **rfc822);
+
+int CtdlIsMe(char *addr, int addr_buf_len);
+int CtdlHostAlias(char *fqdn);
+char *harvest_collected_addresses(struct CtdlMessage *msg);
+
+/*
+ * Values that can be returned by CtdlHostAlias()
+ */