Unrecognized Ssl Message Plaintext Connection Smtp

• Unsupported Or Unrecognized Ssl Message
• Ssl Smtp Server
• Unrecognized Ssl Message Plaintext Connection Smtp Yahoo Mail
• Unrecognized Ssl Message Plaintext Connection
• Smtp Ssl Or Tls

I have a java complied package to speak with the https server on net. Running the compilation gives the following exception:

SMTP relay is Office365 relay from Office365 subscription. Parameters to connect: smtp.office365.com:587. In general there are two cases for secure connection: SSL (First SSL handshake, then SMTP HELO) TLS (First SMTP HELO, then STARTLS) CS does not allow to specify method to use and by default use SSL, what leads to errors. Unfortunately no connection was possible. Review the errors below and rectify: SSLException: Unrecognized SSL message, plaintext connection? I'm trying to set up PingOne for Customers to integrate email services with Office365 and I'm receiving this message when testing the connection:Could not connect to SMTP host: smtp.office365.com, port: 587; nested exception is: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connect.

My SMTP settings say to use TLS encryption, not SSL. I've tried with and without the SSL as well. Tried using the POP and/or IMAP ports and configuration and can't get anywhere.

I think this is due to the connection established with the client machine is not secure. Is there any way to configure the local machine or ports in order to connect to the remote https server?

I think this is due to the connection
established with the client machine is
not secure.

Unsupported Or Unrecognized Ssl Message

It is due to the fact that you are talking to an HTTP server, not an HTTPS server. Probably you didn't use the correct port number for HTTPS.

You should have a local SMTP domain name that will contact the mail server and establishes a new connection as well you should change the SSL property in your programming below

I got the same error message when I forgot to log in to the company firewall, before performing a POST request through a proxy.

I got the same error. it was because I was accessing the https port using http. The issue solved when I changed http to https.

I face the same issue from Java application built in Jdevelopr 11.1.1.7 IDE. I solved the issue by unchecking the use of proxy form Project properties.

You can find it in the following:
Project Properties -> (from left panle )Run/Debug/Profile ->Click (edit) form the right panel -> Tool Setting from the left panel -> uncheck (Use Proxy) option.

It worked for me now, I have change the setting of my google account as below:

Though I have enabled SSL and TSL while running program in this link of same post. I spend a lot of time but than I realized and found this link.
And done 2 following steps and setting control in google. :

• Disable the 2-step verification (password and OTP)

• Enabling to allow to access less secure app(Allow less secure apps:
  ON.)

Ssl Smtp Server

Now I am able to send mail using above program.

As EJP said, it's a message shown because of a call to a non-https protocol.
If you are sure it is HTTPS, check your bypass proxy settings, and in case add your webservice host url to the bypass proxy list

Adding this as an answer as it might help someone later.

I had to force jvm to use the IPv4 stack to resolve the error. My application used to work within company network, but while connecting from home it gave the same exception. No proxy involved. Added the jvm argument
-Djava.net.preferIPv4Stack=true and all the https requests were behaving normally.

if connection is FTPS test:

FTPSClient ftpClient = new FTPSClient(protocol, false);

protocol = TLS,SSL
and false = isImplicit.

Another reason is maybe 'access denided', maybe you can't access to the URI and received blocking response page for internal network access. If you are not sure your application zone need firewall rule, you try to connect from terminal,command line.
For GNU/Linux or Unix, you can try run like this command and see result is coming from blocking rule or really remote address: echo | nc -v yazilimcity.net 443

Unrecognized Ssl Message Plaintext Connection Smtp Yahoo Mail

Maybe your default cerficate has expired. to renew it through admin console go 'Security >SSL certificate and key management > Key stores and certificates > NodeDefaultKeyStore > Personal certificates' select the 'default' alias and click on 'renew' after then restart WAS.

If you're running the Java process from the command line on Java 6 or earlier, adding this switch solved the issue above for me:

Unrecognized Ssl Message Plaintext Connection

-Dhttps.protocols='TLSv1″

I got the same error message when I forgot to log in to the company firewall, before performing a POST request through a proxy.

I got the same error. it was because I was accessing the https port using http. The issue solved when I changed http to https.

I face the same issue from Java application built in Jdevelopr 11.1.1.7 IDE. I solved the issue by unchecking the use of proxy form Project properties.

You can find it in the following:
Project Properties -> (from left panle )Run/Debug/Profile ->Click (edit) form the right panel -> Tool Setting from the left panel -> uncheck (Use Proxy) option.

It worked for me now, I have change the setting of my google account as below:

Though I have enabled SSL and TSL while running program in this link of same post. I spend a lot of time but than I realized and found this link.
And done 2 following steps and setting control in google. :

• Disable the 2-step verification (password and OTP)

• Enabling to allow to access less secure app(Allow less secure apps:
  ON.)

Ssl Smtp Server

Now I am able to send mail using above program.

As EJP said, it's a message shown because of a call to a non-https protocol.
If you are sure it is HTTPS, check your bypass proxy settings, and in case add your webservice host url to the bypass proxy list

Adding this as an answer as it might help someone later.

I had to force jvm to use the IPv4 stack to resolve the error. My application used to work within company network, but while connecting from home it gave the same exception. No proxy involved. Added the jvm argument
-Djava.net.preferIPv4Stack=true and all the https requests were behaving normally.

if connection is FTPS test:

FTPSClient ftpClient = new FTPSClient(protocol, false);

protocol = TLS,SSL
and false = isImplicit.

Another reason is maybe 'access denided', maybe you can't access to the URI and received blocking response page for internal network access. If you are not sure your application zone need firewall rule, you try to connect from terminal,command line.
For GNU/Linux or Unix, you can try run like this command and see result is coming from blocking rule or really remote address: echo | nc -v yazilimcity.net 443

Unrecognized Ssl Message Plaintext Connection Smtp Yahoo Mail

Maybe your default cerficate has expired. to renew it through admin console go 'Security >SSL certificate and key management > Key stores and certificates > NodeDefaultKeyStore > Personal certificates' select the 'default' alias and click on 'renew' after then restart WAS.

If you're running the Java process from the command line on Java 6 or earlier, adding this switch solved the issue above for me:

Unrecognized Ssl Message Plaintext Connection

-Dhttps.protocols='TLSv1″

Smtp Ssl Or Tls

Tags: exception, ssl, text