Could not connect to SMTP host error in my local only - java

I am getting this error while trying to send mail through java mail. It used to work for me, but recently I switched to jdk7 and glassfish 3.1.2. I tried to switch it back to jdk6 also but it's not working anymore, here is the error I'm getting:
javax.mail.MessagingException: Could not connect to SMTP host: smtp.illumina.com, port: 25;
nested exception is:
java.net.SocketException: Permission denied: connect
Telnet and ping to this server is fine. Its working from other systems. Only my local setup is throwing this error.
Any ideas?

Related

Spring Boot - Java Mail - Couldn't connect to host

I've implemented the email manager using JavaMailSender into my Java application, configured with Gmail email, and locally tested.
I'm using a free domain by freenom.
in localhost on my pc everything working perfectly. But deploying on the server the application obtains this error:
c.m.a.m.components.EmailManager : sendRegisterEmail Exception: Mail server connection failed;
nested exception is com.sun.mail.util.MailConnectException:
Couldn't connect to host, port: smtp.gmail.com, 587; timeout -1;
nested exception is:
java.net.UnknownHostException: smtp.gmail.com. Failed messages:
com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.gmail.com, 587; timeout -1;
nested exception is:
java.net.UnknownHostException: smtp.gmail.com
test done
Generating an application password
Using directly the host IP
Using port 465 and 25
Disabling VPS firewall
Used another mail provider
application.properties
spring.mail.host=smtp.gmail.com
spring.mail.port=587
spring.mail.username=***********#gmail.com
spring.mail.password=***********
spring.mail.properties.mail.debug=false
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.mime.charset=UTF-8
spring.mail.transport.protocol=smtp
Try to change spring.mail.port to 465. This might help.
Port 587 is technically correct. However, many ESPs have adopted implicit TLS on port 465.
Also, there's probably a firewall preventing you from connecting directly, you may need to connect through a proxy.

Could not send e-mail using WildFly 17 running on Ubuntu 18.04 / Windows 10

I am using java, and wilfly 17 running on ubuntu 18 and would like to send an e-mail via localhost / a remote host, i.e. gmail, using this server.
I have implemented the solution described in
send mail via localhost
and then tried implementing the solution described in
send mail via remote host
But, unfortunately, in both cases I am getting one and the same exception
Couldn't connect to host, port: localhost, 25; timeout -1: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: localhost, 25; timeout -1;
nested exception is:
java.net.ConnectException: Connection refused (Connection refused)
at javax.mail.api#1.6.2//com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2209)
at javax.mail.api#1.6.2//com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:740)
respectively:
Couldn't connect to host, port: mail.google.com, 25; timeout -1: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: mail.google.com, 25; timeout -1;
nested exception is:
java.net.ConnectException: Connection timed out (Connection timed out)
at javax.mail.api#1.6.2//com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2209)
at javax.mail.api#1.6.2//com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:740)
at javax.mail.api#1.6.2//javax.mail.Service.connect(Service.java:388)
Regarding allowing outbound connections on my Ubuntu system, I have allowed all outbound connections as described in
allow inbound/ outbound connections Ubuntu
I just have tried sending an email through WildFly 17 running on Windows 10, but I am getting the same exception as above:
(default task-6) Couldn't connect to host, port: mail.google.com, 25; timeout -1: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: mail.google.com, 25; timeout -1;
nested exception is:
java.net.ConnectException: Connection timed out: connect
at javax.mail.api#1.6.2//com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2209)
at javax.mail.api#1.6.2//com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:740)
at javax.mail.api#1.6.2//javax.mail.Service.connect(Service.java:388)
Thank you guys for your comments!
Ultimately I solved the problem by following exactly the steps listed here:
Configure WildFly to send eMails
then, after having recieved the exception
javax.mail.AuthenticationFailedException: 535-5.7.8 Username and Password not accepted. Learn more at
535 5.7.8
I logged on into my gmail account, on behalf of which I wanted to send e-mails, and enabled the option in this link:
Enable less secure apps gmail
Then I tested my solution on both Ubuntu 18.04 and Windows 10 and it worked in both cases!

Mail sending -SMTP error with javaMailSender

I am running a program to send email using spring boot with gmail smtp.
The same code works fine in my personal laptop.
But when I try to run it in office laptop it doesn't work and says
SMTP timeout:
Couldn't connect to host, port: smtp.gmail.com, 587; timeout -1;
I feel it is because of firewall or proxy.
I tried to check from Outlook but could not get smtp name , i tried some hit and trial also.
Any possible solution.

RMI Server on Unix machine

I have an RMI server and RMI client programs, when I execute RMI server on unix machine, and RMI client on Windows machine, I am getting
java.rmi.ConnectException: Connection
refused to host: ; nested exception is: java.net.ConnectException:
Connection refused: connect at
sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619) at
sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
at the client side. I am able to execute on server and client on windows system but the server on linux is not working.
I searched using google, but I am unable to find the reason and fix.
I would appreciate your help.
Thank you in advance!
Referring the url
java.rmi.ConnectException: Connection refused to host: 127.0.1.1;
I added a line to /etc/hosts file and it works, but I am accessing the host using the IP address in my client program.
I did not understand why do we need to add a line to the /etc/hosts file.
Any comments. Thank You!.

Cannot send mails via outlook through java application

Have the following mail configuration settings :
mail.smtp.host=smtp.us.deloitte.com
mail.smtp.socketFactory.port=25
mail.smtp.socketFactory.class=javax.net.ssl.SSLSocketFactory
mail.smtp.auth=true
mail.smtp.port=25
and the following properties :
mail.password=password
mail.from=sam#xyz.com
mail.to=sam#xyz.com
mail.subject=Status of Data pushed
I get the following error :
java.lang.RuntimeException: javax.mail.MessagingException: Could not connect to SMTP host: smtp.us.deloitte.com, port: 25;
nested exception is:
java.net.SocketException: Permission denied:
The same code when I use gmail as the 'from' account and the Outlook account in 'to', it works.
I tried setting setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true, also disabled iPv6 on Windows 7 box, but nothing seems to work
Just an observation: You are using STMPS protocol, and most SMTPS servers still communicates on the deprecated port 465 or the standardized port 587 and not 25.

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