diff --git a/CHANGELOG.md b/CHANGELOG.md
index 23ad02cec6d5..2af208737e4d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,7 @@ All notable changes to this project will be documented in this file.
 
 - Fix access to Stats API feature in CE plausible/analytics#4244
 - Fix filter suggestions when same filter previously applied
+- Fix MX lookup when using relays with Bamboo.Mua plausible/analytics#4350
 
 ## v2.1.1 - 2024-06-06
 
diff --git a/mix.lock b/mix.lock
index 9474037a6057..d1c8ce65e2aa 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,7 +1,7 @@
 %{
   "acceptor_pool": {:hex, :acceptor_pool, "1.0.0", "43c20d2acae35f0c2bcd64f9d2bde267e459f0f3fd23dab26485bf518c281b21", [:rebar3], [], "hexpm", "0cbcd83fdc8b9ad2eee2067ef8b91a14858a5883cb7cd800e6fcd5803e158788"},
   "bamboo": {:hex, :bamboo, "2.3.0", "d2392a2cabe91edf488553d3c70638b532e8db7b76b84b0a39e3dfe492ffd6fc", [:mix], [{:hackney, ">= 1.15.2", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:mime, "~> 1.4 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "dd0037e68e108fd04d0e8773921512c940e35d981e097b5793543e3b2f9cd3f6"},
-  "bamboo_mua": {:hex, :bamboo_mua, "0.2.0", "3387fbd8f0417dd2995f41e99168015965ebe92221c4f253d15a034a95ae6444", [:mix], [{:bamboo, "~> 2.0", [hex: :bamboo, repo: "hexpm", optional: false]}, {:mail, "~> 0.3.0", [hex: :mail, repo: "hexpm", optional: false]}, {:mua, "~> 0.2.0", [hex: :mua, repo: "hexpm", optional: false]}], "hexpm", "e3f1eddf38e6b5339792641105faed10b855177a720879810483f7d8ab8da8eb"},
+  "bamboo_mua": {:hex, :bamboo_mua, "0.2.1", "caa7e3d4027b01a71a25267c9f3ebc4f8793ae6313971d7a4cb38010c7d1689d", [:mix], [{:bamboo, "~> 2.0", [hex: :bamboo, repo: "hexpm", optional: false]}, {:mail, "~> 0.3.0", [hex: :mail, repo: "hexpm", optional: false]}, {:mua, "~> 0.2.3", [hex: :mua, repo: "hexpm", optional: false]}], "hexpm", "0625b32d0d2fcc584c5e967e08b6f02b9d3ca0b28220713458881e6779b31d22"},
   "bamboo_phoenix": {:hex, :bamboo_phoenix, "1.0.0", "f3cc591ffb163ed0bf935d256f1f4645cd870cf436545601215745fb9cc9953f", [:mix], [{:bamboo, ">= 2.0.0", [hex: :bamboo, repo: "hexpm", optional: false]}, {:phoenix, ">= 1.3.0", [hex: :phoenix, repo: "hexpm", optional: false]}], "hexpm", "6db88fbb26019c84a47994bb2bd879c0887c29ce6c559bc6385fd54eb8b37dee"},
   "bamboo_postmark": {:git, "https://github.com/plausible/bamboo_postmark.git", "5eac6dfdffacd273bd9aacdd3e494a600bb0b170", [branch: "main"]},
   "bamboo_smtp": {:hex, :bamboo_smtp, "4.2.2", "e9f57a2300df9cb496c48751bd7668a86a2b89aa2e79ccaa34e0c46a5f64c3ae", [:mix], [{:bamboo, "~> 2.2.0", [hex: :bamboo, repo: "hexpm", optional: false]}, {:gen_smtp, "~> 1.2.0", [hex: :gen_smtp, repo: "hexpm", optional: false]}], "hexpm", "28cac2ec8adaae02aed663bf68163992891a3b44cfd7ada0bebe3e09bed7207f"},
@@ -86,7 +86,7 @@
   "mjml": {:hex, :mjml, "1.5.0", "20a4ed2490a60c6928d45a69b64fb45ce8d8bdac686ef689315b0adda69c6406", [:mix], [{:rustler, ">= 0.0.0", [hex: :rustler, repo: "hexpm", optional: true]}, {:rustler_precompiled, "~> 0.6.0", [hex: :rustler_precompiled, repo: "hexpm", optional: false]}], "hexpm", "44dc36c0fccf52eeb8e0afcb26a863ba41a5f9adcb71bb32e084619a13bb4cdf"},
   "mjml_eex": {:hex, :mjml_eex, "0.11.0", "f0845730f4caccddea7c98ab5ad1485831446b7c09896fa5ed54b3fa0c431e72", [:mix], [{:erlexec, "~> 2.0", [hex: :erlexec, repo: "hexpm", optional: true]}, {:mjml, "~> 1.0 or ~> 2.0 or ~> 3.0", [hex: :mjml, repo: "hexpm", optional: false]}, {:phoenix_html, "~> 3.2 or ~> 4.0", [hex: :phoenix_html, repo: "hexpm", optional: false]}, {:telemetry, "~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "0c60732fe766336ec504a94cad4ebf30405f05fa8920a544ff0ef936252438ac"},
   "mox": {:hex, :mox, "1.1.0", "0f5e399649ce9ab7602f72e718305c0f9cdc351190f72844599545e4996af73c", [:mix], [], "hexpm", "d44474c50be02d5b72131070281a5d3895c0e7a95c780e90bc0cfe712f633a13"},
-  "mua": {:hex, :mua, "0.2.0", "ca7e7a00848719c95c6f72094b41e7b9af1ad85048b948d696d6a8f9e31dcdd3", [:mix], [{:castore, "~> 0.1.0 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}], "hexpm", "b8dc60683ff03ca85359ecd83db7f7da66cf2eada1289e0bb531b0724702c09a"},
+  "mua": {:hex, :mua, "0.2.3", "46b29b7b2bb14105c0b7be9526f7c452df17a7841b30b69871c024a822ff551c", [:mix], [{:castore, "~> 0.1.0 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}], "hexpm", "7fe861a87fcc06a980d3941bbcb2634e5f0f30fd6ad15ef6c0423ff9dc7e46de"},
   "nanoid": {:hex, :nanoid, "2.1.0", "d192a5bf1d774258bc49762b480fca0e3128178fa6d35a464af2a738526607fd", [:mix], [], "hexpm", "ebc7a342d02d213534a7f93a091d569b9fea7f26fcd3a638dc655060fc1f76ac"},
   "nimble_csv": {:hex, :nimble_csv, "1.2.0", "4e26385d260c61eba9d4412c71cea34421f296d5353f914afe3f2e71cce97722", [:mix], [], "hexpm", "d0628117fcc2148178b034044c55359b26966c6eaa8e2ce15777be3bbc91b12a"},
   "nimble_options": {:hex, :nimble_options, "1.1.1", "e3a492d54d85fc3fd7c5baf411d9d2852922f66e69476317787a7b2bb000a61b", [:mix], [], "hexpm", "821b2470ca9442c4b6984882fe9bb0389371b8ddec4d45a9504f00a66f650b44"},