[Web] Allow to specify transport test rcpt

data/web/lang/lang.en.json

@@ -271,6 +271,7 @@
         "regen_api_key": "Regenerate API key",
         "regex_maps": "Regex maps",
         "relay_from": "\"From:\" address",
+        "relay_rcpt": "\"To:\" address",
         "relay_run": "Run test",
         "relayhosts": "Sender-dependent transports",
         "relayhosts_hint": "Define sender-dependent transports to be able to select them in a domains configuration dialog.<br>\r\n  The transport service is always \"smtp:\" and will therefore try TLS when offered. Wrapped TLS (SMTPS) is not supported. A users individual outbound TLS policy setting is taken into account.<br>\r\n  Affects selected domains including alias domains.",
@@ -312,6 +313,7 @@
         "transport_dest_format": "Syntax: example.org, .example.org, *, box@example.org (multiple values can be comma-separated)",
         "transport_maps": "Transport Maps",
         "transports_hint": "→ A transport map entry <b>overrules</b> a sender-dependent transport map</b>.<br>\r\n→ Outbound TLS policy settings per-user are ignored and can only be enforced by TLS policy map entries.<br>\r\n→ The transport service for defined transports is always \"smtp:\" and will therefore try TLS when offered. Wrapped TLS (SMTPS) is not supported.<br>\r\n→ Addresses matching \"/localhost$/\" will always be transported via \"local:\", therefore a \"*\" destination will not apply to those addresses.<br>\r\n→ To determine credentials for an exemplary next hop \"[host]:25\", Postfix <b>always</b> queries for \"host\" before searching for \"[host]:25\". This behavior makes it impossible to use \"host\" and \"[host]:25\" at the same time.",
+        "transport_test_rcpt_info": "→ Use null@hosted.mailcow.de to test relaying to a foreign destination.",
         "ui_footer": "Footer (HTML allowed)",
         "ui_header_announcement": "Announcements",
         "ui_header_announcement_active": "Set announcement active",