1 files changed, 4 insertions, 0 deletions
diff --git a/src/mail.h b/src/mail.h
index 5efade5..2c5da2f 100644
--- a/src/mail.h
+++ b/src/mail.h
@@ -14,6 +14,10 @@ struct mail_message {
     size_t attach_len;
 };
 
+/* True for an address the SMTP client can send to: one @, no spaces or
+   control characters, not empty. */
+int mail_addr_valid(const char *addr);
+
 /* Checks the org's SMTP settings (including decrypting the stored
    smtp_password) without sending. 0 configured, -1 not configured. */
 int mail_config_check(sqlite3 *db, int64_t org_id, char *err, size_t errlen);