SMTP IONOS ERROR

[MrTwax]

Hello, I have Alf.io running on a v server from ionos. Now I wanted to set up email via smtp but no matter what I do it doesn't work, maybe someone has an idea?

[WARN ] 2025-01-22 19:07:09.746 [scheduling-1] NotificationManager - could not send message:
org.springframework.mail.MailSendException: Mail server connection failed; nested exception is javax.mail.MessagingException: Could not connect to SMTP host: smtp.ionos.de, port: 587;
nested exception is:
javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate). Failed messages: javax.mail.MessagingException: Could not connect to SMTP host: smtp.ionos.de, port: 587;
nested exception is:
javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:448) ~[spring-context-support-5.3.18.jar!/:5.3.18]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:361) ~[spring-context-support-5.3.18.jar!/:5.3.18]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:378) ~[spring-context-support-5.3.18.jar!/:5.3.18]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:366) ~[spring-context-support-5.3.18.jar!/:5.3.18]
at alfio.manager.system.SmtpMailer.send(SmtpMailer.java:95) ~[classes!/:?]
at alfio.manager.system.DefaultMailer.send(DefaultMailer.java:64) ~[classes!/:?]
at alfio.manager.NotificationManager.sendMessage(NotificationManager.java:413) ~[classes!/:?]
at alfio.manager.NotificationManager.lambda$processMessage$18(NotificationManager.java:398) ~[classes!/:?]
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:140) ~[spring-tx-5.3.18.jar!/:5.3.18]
at alfio.manager.NotificationManager.processMessage(NotificationManager.java:397) ~[classes!/:?]
at alfio.manager.NotificationManager.lambda$sendWaitingMessages$14(NotificationManager.java:381) ~[classes!/:?]
at java.util.stream.ReferencePipeline$4$1.accept(ReferencePipeline.java:214) [?:?]
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) [?:?]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) [?:?]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) [?:?]
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) [?:?]
at java.util.stream.ForEachOps$ForEachOp$OfInt.evaluateSequential(ForEachOps.java:188) [?:?]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) [?:?]
at java.util.stream.IntPipeline.forEach(IntPipeline.java:463) [?:?]
at java.util.stream.ReferencePipeline$8$1.accept(ReferencePipeline.java:324) [?:?]
at java.util.HashMap$EntrySpliterator.forEachRemaining(HashMap.java:1850) [?:?]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) [?:?]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) [?:?]
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) [?:?]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) [?:?]
at java.util.stream.IntPipeline.reduce(IntPipeline.java:515) [?:?]
at java.util.stream.IntPipeline.sum(IntPipeline.java:473) [?:?]
at alfio.manager.NotificationManager.sendWaitingMessages(NotificationManager.java:382) [classes!/:?]
at alfio.manager.NotificationManager$$FastClassBySpringCGLIB$$3482d7f4.invoke() [classes!/:?]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) [spring-core-5.3.18.jar!/:5.3.18]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:783) [spring-aop-5.3.18.jar!/:5.3.18]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) [spring-aop-5.3.18.jar!/:5.3.18]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753) [spring-aop-5.3.18.jar!/:5.3.18]
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123) [spring-tx-5.3.18.jar!/:5.3.18]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388) [spring-tx-5.3.18.jar!/:5.3.18]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) [spring-tx-5.3.18.jar!/:5.3.18]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) [spring-aop-5.3.18.jar!/:5.3.18]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753) [spring-aop-5.3.18.jar!/:5.3.18]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:698) [spring-aop-5.3.18.jar!/:5.3.18]
at alfio.manager.NotificationManager$$EnhancerBySpringCGLIB$$ee69c2f1.sendWaitingMessages() [classes!/:?]
at alfio.job.Jobs.sendEmails(Jobs.java:114) [classes!/:?]
at jdk.internal.reflect.GeneratedMethodAccessor106.invoke(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:569) ~[?:?]
at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:84) [spring-context-5.3.18.jar!/:5.3.18]
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) [spring-context-5.3.18.jar!/:5.3.18]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305) [?:?]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) [?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
at java.lang.Thread.run(Thread.java:840) [?:?]
Caused by: javax.mail.MessagingException: Could not connect to SMTP host: smtp.ionos.de, port: 587
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1961) ~[mail-1.5.0-b01.jar!/:1.5.0-b01]
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654) ~[mail-1.5.0-b01.jar!/:1.5.0-b01]
at javax.mail.Service.connect(Service.java:295) ~[mail-1.5.0-b01.jar!/:1.5.0-b01]
at org.springframework.mail.javamail.JavaMailSenderImpl.connectTransport(JavaMailSenderImpl.java:518) ~[spring-context-support-5.3.18.jar!/:5.3.18]
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:437) ~[spring-context-support-5.3.18.jar!/:5.3.18]
... 51 more
Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
at sun.security.ssl.HandshakeContext.(HandshakeContext.java:172) ~[?:?]
at sun.security.ssl.ClientHandshakeContext.(ClientHandshakeContext.java:103) ~[?:?]
at sun.security.ssl.TransportContext.kickstart(TransportContext.java:252) ~[?:?]
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:448) ~[?:?]
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:426) ~[?:?]
at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:527) ~[mail-1.5.0-b01.jar!/:1.5.0-b01]
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:332) ~[mail-1.5.0-b01.jar!/:1.5.0-b01]
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:234) ~[mail-1.5.0-b01.jar!/:1.5.0-b01]
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1927) ~[mail-1.5.0-b01.jar!/:1.5.0-b01]
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654) ~[mail-1.5.0-b01.jar!/:1.5.0-b01]
at javax.mail.Service.connect(Service.java:295) ~[mail-1.5.0-b01.jar!/:1.5.0-b01]
at org.springframework.mail.javamail.JavaMailSenderImpl.connectTransport(JavaMailSenderImpl.java:518) ~[spring-context-support-5.3.18.jar!/:5.3.18]
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:437) ~[spring-context-support-5.3.18.jar!/:5.3.18]
... 51 more

[MrTwax]

I have now found the error I just have to enter the correct properties in the web interface.