diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java
index e9f0a606f28d..a10787d99b6d 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java
@@ -189,7 +189,7 @@ public void setAddresses(String addresses) {
 	private List<Address> parseAddresses(String addresses) {
 		List<Address> parsedAddresses = new ArrayList<>();
 		for (String address : StringUtils.commaDelimitedListToStringArray(addresses)) {
-			parsedAddresses.add(new Address(address));
+			parsedAddresses.add(new Address(address, getSsl().isEnabled()));
 		}
 		return parsedAddresses;
 	}
@@ -390,7 +390,7 @@ public boolean determineEnabled() {
 				return isEnabled();
 			}
 			Address address = RabbitProperties.this.parsedAddresses.get(0);
-			return address.secureConnection;
+			return address.determineSslEnabled(isEnabled());
 		}
 
 		public void setEnabled(boolean enabled) {
@@ -989,14 +989,14 @@ private static final class Address {
 
 		private String virtualHost;
 
-		private boolean secureConnection;
+		private Boolean secureConnection;
 
-		private Address(String input) {
+		private Address(String input, boolean sslEnabled) {
 			input = input.trim();
 			input = trimPrefix(input);
 			input = parseUsernameAndPassword(input);
 			input = parseVirtualHost(input);
-			parseHostAndPort(input);
+			parseHostAndPort(input, sslEnabled);
 		}
 
 		private String trimPrefix(String input) {
@@ -1005,7 +1005,8 @@ private String trimPrefix(String input) {
 				return input.substring(PREFIX_AMQP_SECURE.length());
 			}
 			if (input.startsWith(PREFIX_AMQP)) {
-				input = input.substring(PREFIX_AMQP.length());
+				this.secureConnection = false;
+				return input.substring(PREFIX_AMQP.length());
 			}
 			return input;
 		}
@@ -1036,11 +1037,11 @@ private String parseVirtualHost(String input) {
 			return input;
 		}
 
-		private void parseHostAndPort(String input) {
+		private void parseHostAndPort(String input, boolean sslEnabled) {
 			int portIndex = input.indexOf(':');
 			if (portIndex == -1) {
 				this.host = input;
-				this.port = (this.secureConnection) ? DEFAULT_PORT_SECURE : DEFAULT_PORT;
+				this.port = (determineSslEnabled(sslEnabled)) ? DEFAULT_PORT_SECURE : DEFAULT_PORT;
 			}
 			else {
 				this.host = input.substring(0, portIndex);
@@ -1048,6 +1049,10 @@ private void parseHostAndPort(String input) {
 			}
 		}
 
+		private boolean determineSslEnabled(boolean sslEnabled) {
+			return (this.secureConnection != null) ? this.secureConnection : sslEnabled;
+		}
+
 	}
 
 }
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/amqp/RabbitPropertiesTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/amqp/RabbitPropertiesTests.java
index 3a852a4b3a28..ac84b9ff600a 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/amqp/RabbitPropertiesTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/amqp/RabbitPropertiesTests.java
@@ -102,6 +102,14 @@ void determinePortUsingAmqpsReturnsPortOfFirstAddress() {
 		assertThat(this.properties.determinePort()).isEqualTo(5671);
 	}
 
+	@Test
+	void determinePortReturnsDefaultAmqpsPortWhenFirstAddressHasNoExplicitPortButSslEnabled() {
+		this.properties.getSsl().setEnabled(true);
+		this.properties.setPort(1234);
+		this.properties.setAddresses("rabbit1.example.com,rabbit2.example.com:2345");
+		assertThat(this.properties.determinePort()).isEqualTo(5671);
+	}
+
 	@Test
 	void virtualHostDefaultsToNull() {
 		assertThat(this.properties.getVirtualHost()).isNull();
@@ -241,6 +249,20 @@ void determineSslUsingAmqpsReturnsStateOfFirstAddress() {
 		assertThat(this.properties.getSsl().determineEnabled()).isTrue();
 	}
 
+	@Test
+	void sslDetermineEnabledIsTrueWhenAddressHasNoProtocolAndSslIsEnabled() {
+		this.properties.getSsl().setEnabled(true);
+		this.properties.setAddresses("root:password@otherhost");
+		assertThat(this.properties.getSsl().determineEnabled()).isTrue();
+	}
+
+	@Test
+	void sslDetermineEnabledIsFalseWhenAddressHasNoProtocolAndSslIsDisabled() {
+		this.properties.getSsl().setEnabled(false);
+		this.properties.setAddresses("root:password@otherhost");
+		assertThat(this.properties.getSsl().determineEnabled()).isFalse();
+	}
+
 	@Test
 	void determineSslUsingAmqpReturnsStateOfFirstAddress() {
 		this.properties.setAddresses("amqp://root:password@otherhost,amqps://root:password2@otherhost2");