Removed local concurrency limiters, switch to global rate limiting

tests/resources/acme/config.toml

@@ -22,9 +22,6 @@ oauth.key = "0Wn7rO4UdmBoE8mp3cDcD9Qlpz3na74z7fGRoSuq8fVsGPelLl3KrHomBN8h2biA"
 queue.quota.size.enable = true
 queue.quota.size.messages = 100000
 queue.quota.size.size = 10737418240
-queue.throttle.rcpt.concurrency = 5
-queue.throttle.rcpt.enable = true
-queue.throttle.rcpt.key = "rcpt_domain"
 report.analysis.addresses = "postmaster@*"
 server.http.permissive-cors = true
 server.listener.http.bind = "[::]:5002"
@@ -46,13 +43,6 @@ server.listener.submission.protocol = "smtp"
 server.listener.submissions.bind = "[::]:465"
 server.listener.submissions.protocol = "smtp"
 server.listener.submissions.tls.implicit = true
-session.throttle.ip.concurrency = 5
-session.throttle.ip.enable = true
-session.throttle.ip.key = "remote_ip"
-session.throttle.sender.enable = true
-session.throttle.sender.key.0 = "sender_domain"
-session.throttle.sender.key.1 = "rcpt"
-session.throttle.sender.rate = "25/1h"
 storage.blob = "rocksdb"
 storage.data = "rocksdb"
 storage.directory = "internal"

tests/resources/smtp/antispam/rbl.test

@@ -7,7 +7,7 @@ test
 
 <!-- NEXT TEST -->
 remote_ip 20.11.0.2
-expect RBL_SENDERSCORE_REPUT_0 RBL_NIXSPAM RBL_SEM RBL_SPAMHAUS_SBL RBL_BARRACUDA RBL_BLOCKLISTDE RBL_VIRUSFREE_BOTNET RBL_SPAMCOP RCVD_IN_DNSWL_MED
+expect RBL_SENDERSCORE_REPUT_0 RBL_SEM RBL_SPAMHAUS_SBL RBL_BARRACUDA RBL_BLOCKLISTDE RBL_VIRUSFREE_BOTNET RBL_SPAMCOP RCVD_IN_DNSWL_MED
 
 Subject: test
 

tests/resources/smtp/config/throttle.toml

@@ -1,12 +1,11 @@
 [[throttle]]
 match = "remote_ip == '127.0.0.1'"
 key = ["remote_ip", "authenticated_as"]
-concurrency = 100
 rate = "50/30s"
 enable = true
 
 [[throttle]]
 key = "sender_domain"
-concurrency = 10000
+rate = "50/30s"
 enable = true