EmailProfileManager send email / com.sun.mail.util.MailConnectException

Module Development
1

Ignition 8.1.51

I use the following code to send email from a module,
from Config>Network>Email Profiles test it's ok the email is well send and I received it,
but from the code I have the following error:
(profile Classic SMTP)

Do I missed something or used a wrong parameter :face_with_monocle:

(gatewayContext.getEmailProfileManager().getProfile(email_emailProfileName).isPresent()){
                EmailMessage emailMessage = EmailMessage.builder()
                        .setFrom(this.email_fromAddress)
                        .setSubject(subject)
                        .setBody(messageEscape)
                        .setContentType(contentType)
                        .setToRecipients(toRecipients)
                        .setCcRecipients(ccRecipients)
                        .setBccRecipients(bccRecipients)
                        .setAttachNames(attachNames)
                        .setAttachData(attachData)
                        .setTimeout(this.email_retryDelaySec)
                        .setRetries(this.email_retryCount)
                        .setPriority(priority)
                        .setReplyTo(replyTo)
                        .build();

                logger.info("emailMessage = {}",emailMessage.toString());
                gatewayContext.getEmailProfileManager().getProfile(email_emailProfileName).get().sendEmail(emailMessage);

Exception on sendEmail

com.sun.mail.util.MailConnectException: Couldn't connect to host, port: mail.smtp2go.com, 25; timeout 60
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2209)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:740)
at javax.mail.Service.connect(Service.java:388)
at javax.mail.Service.connect(Service.java:246)
at javax.mail.Service.connect(Service.java:195)
at javax.mail.Transport.send0(Transport.java:254)
at javax.mail.Transport.send(Transport.java:124)
at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.sendMailWithRetries(AbstractSmtpEmailProfile.java:289)
at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.doSendEmail(AbstractSmtpEmailProfile.java:259)
at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.sendEmail(AbstractSmtpEmailProfile.java:72)
at com.inductiveautomation.ignition.gateway.mail.EmailProfileManagerImpl$RunningEmailProfile.sendEmail(EmailProfileManagerImpl.java:455)
at com.bouyguesenergiesservices.ignition.gateway.alarmnotification.NotificationManager.sendEmailToProfile(NotificationManager.java:1120)
at com.bouyguesenergiesservices.ignition.gateway.alarmnotification.NotificationManager.lambda$sendEmail$0(NotificationManager.java:1034)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.net.SocketTimeoutException: Connect timed out
at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(Unknown Source)
at java.base/sun.nio.ch.NioSocketImpl.connect(Unknown Source)
at java.base/java.net.SocksSocketImpl.connect(Unknown Source)
at java.base/java.net.Socket.connect(Unknown Source)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:357)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:238)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2175)

com.sun.mail.util.MailConnectException: Couldn't connect to host, port: mail.smtp2go.com, 25; timeout 60
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2209)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:740)
at javax.mail.Service.connect(Service.java:388)
at javax.mail.Service.connect(Service.java:246)
at javax.mail.Service.connect(Service.java:195)
at javax.mail.Transport.send0(Transport.java:254)
at javax.mail.Transport.send(Transport.java:124)
at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.sendMailWithRetries(AbstractSmtpEmailProfile.java:289)
at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.doSendEmail(AbstractSmtpEmailProfile.java:259)
at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.sendEmail(AbstractSmtpEmailProfile.java:72)
at com.inductiveautomation.ignition.gateway.mail.EmailProfileManagerImpl$RunningEmailProfile.sendEmail(EmailProfileManagerImpl.java:455)
at com.bouyguesenergiesservices.ignition.gateway.alarmnotification.NotificationManager.sendEmailToProfile(NotificationManager.java:1120)
at com.bouyguesenergiesservices.ignition.gateway.alarmnotification.NotificationManager.lambda$sendEmail$0(NotificationManager.java:1034)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.net.SocketTimeoutException: Connect timed out
at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(Unknown Source)
at java.base/sun.nio.ch.NioSocketImpl.connect(Unknown Source)
at java.base/java.net.SocksSocketImpl.connect(Unknown Source)
at java.base/java.net.Socket.connect(Unknown Source)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:357)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:238)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2175)

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INFO   | jvm 1    | 2025/12/19 19:27:13 | DEBUG: setDebug: JavaMail version 1.6.2
INFO   | jvm 1    | 2025/12/19 19:27:13 | DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
INFO   | jvm 1    | 2025/12/19 19:27:13 | DEBUG SMTP: need username and password for authentication
INFO   | jvm 1    | 2025/12/19 19:27:13 | DEBUG SMTP: protocolConnect returning false, host=mail.smtp2go.com, user=*********, password=<null>
INFO   | jvm 1    | 2025/12/19 19:27:13 | DEBUG SMTP: useEhlo true, useAuth true
INFO   | jvm 1    | 2025/12/19 19:27:13 | DEBUG SMTP: trying to connect to host "mail.smtp2go.com", port 25, isSSL false
INFO   | jvm 1    | 2025/12/19 19:27:13 | W [g.EmailProfile                ] [19:27:13.303]: Email with subject Ignition Alarm Notification could not be sent to one or more recipients. Will retry 3 more time(s). name=emailProfile, id=1, type=smtp.classic
INFO   | jvm 1    | 2025/12/19 19:27:13 | com.sun.mail.util.MailConnectException: Couldn't connect to host, port: mail.smtp2go.com, 25; timeout 60
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2209)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:740)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at javax.mail.Service.connect(Service.java:388)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at javax.mail.Service.connect(Service.java:246)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at javax.mail.Service.connect(Service.java:195)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at javax.mail.Transport.send0(Transport.java:254)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at javax.mail.Transport.send(Transport.java:124)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.sendMailWithRetries(AbstractSmtpEmailProfile.java:289)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.doSendEmail(AbstractSmtpEmailProfile.java:259)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.sendEmail(AbstractSmtpEmailProfile.java:72)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at com.inductiveautomation.ignition.gateway.mail.EmailProfileManagerImpl$RunningEmailProfile.sendEmail(EmailProfileManagerImpl.java:455)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at com.bouyguesenergiesservices.ignition.gateway.alarmnotification.NotificationManager.sendEmailToProfile(NotificationManager.java:1122)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at com.bouyguesenergiesservices.ignition.gateway.alarmnotification.NotificationManager.lambda$sendEmail$0(NotificationManager.java:1034)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at java.base/java.lang.Thread.run(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:27:13 | Caused by: java.net.SocketTimeoutException: Connect timed out
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at java.base/sun.nio.ch.NioSocketImpl.connect(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at java.base/java.net.SocksSocketImpl.connect(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at java.base/java.net.Socket.connect(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:357)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:238)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2175)
INFO   | jvm 1    | 2025/12/19 19:27:13 | 	... 18 common frames omitted
``
2

That's a pretty basic firewall error. (Or a service account without network privileges.)

3

The test from the gateway UI is ok, and the ignition module execute on the same gateway, firewall is off...

very stange, if I compare the sequencewhen the mail is send from the module:

INFO   | jvm 1    | 2025/12/19 19:47:36 | DEBUG: setDebug: JavaMail version 1.6.2
INFO   | jvm 1    | 2025/12/19 19:47:36 | DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
INFO   | jvm 1    | 2025/12/19 19:47:36 | DEBUG SMTP: need username and password for authentication
INFO   | jvm 1    | 2025/12/19 19:47:36 | DEBUG SMTP: protocolConnect returning false, host=mail.smtp2go.com, user=*******, password=<null>
INFO   | jvm 1    | 2025/12/19 19:47:36 | DEBUG SMTP: useEhlo true, useAuth true
INFO   | jvm 1    | 2025/12/19 19:47:36 | DEBUG SMTP: trying to connect to host "mail.smtp2go.com", port 25, isSSL false
INFO   | jvm 1    | 2025/12/19 19:47:36 | E [c.b.i.g.a.NotificationManager ] [19:47:36.440]: sendEmailToProfile() - Exception :  
INFO   | jvm 1    | 2025/12/19 19:47:36 | com.sun.mail.util.MailConnectException: Couldn't connect to host, port: mail.smtp2go.com, 25; timeout 60
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2209)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:740)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at javax.mail.Service.connect(Service.java:388)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at javax.mail.Service.connect(Service.java:246)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at javax.mail.Service.connect(Service.java:195)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at javax.mail.Transport.send0(Transport.java:254)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at javax.mail.Transport.send(Transport.java:124)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.sendMailWithRetries(AbstractSmtpEmailProfile.java:289)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.doSendEmail(AbstractSmtpEmailProfile.java:259)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at com.inductiveautomation.ignition.gateway.mail.smtp.AbstractSmtpEmailProfile.sendEmail(AbstractSmtpEmailProfile.java:72)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at com.inductiveautomation.ignition.gateway.mail.EmailProfileManagerImpl$RunningEmailProfile.sendEmail(EmailProfileManagerImpl.java:455)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at com.bouyguesenergiesservices.ignition.gateway.alarmnotification.NotificationManager.sendEmailToProfile(NotificationManager.java:1122)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at com.bouyguesenergiesservices.ignition.gateway.alarmnotification.NotificationManager.lambda$sendEmail$0(NotificationManager.java:1034)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at java.base/java.lang.Thread.run(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:47:36 | Caused by: java.net.SocketTimeoutException: Connect timed out
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at java.base/sun.nio.ch.NioSocketImpl.connect(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at java.base/java.net.SocksSocketImpl.connect(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at java.base/java.net.Socket.connect(Unknown Source)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:357)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:238)
INFO   | jvm 1    | 2025/12/19 19:47:36 | 	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2175)

and from the gateway

INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG: setDebug: JavaMail version 1.6.2
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: need username and password for authentication
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: protocolConnect returning false, host=mail.smtp2go.com, user=****, password=<null>
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: useEhlo true, useAuth true
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: trying to connect to host "mail.smtp2go.com", port 25, isSSL false
INFO   | jvm 1    | 2025/12/19 19:44:40 | 220 mail.smtp2go.com ESMTP Exim 4.98.1-S2G Fri, 19 Dec 2025 18:44:40 +0000
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: connected to host "mail.smtp2go.com", port: 25
INFO   | jvm 1    | 2025/12/19 19:44:40 | EHLO ENR-GTC
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250-mail.smtp2go.com Hello ENR-GTC [77.62.202.212]
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250-SIZE 52428800
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250-LIMITS MAILMAX=5000 RCPTMAX=50000
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250-8BITMIME
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250-DSN
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250-PIPELINING
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250-PIPECONNECT
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250-AUTH CRAM-MD5 PLAIN LOGIN
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250-CHUNKING
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250-STARTTLS
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250-PRDR
INFO   | jvm 1    | 2025/12/19 19:44:40 | 250 HELP
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: Found extension "SIZE", arg "52428800"
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: Found extension "LIMITS", arg "MAILMAX=5000 RCPTMAX=50000"
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: Found extension "8BITMIME", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: Found extension "DSN", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: Found extension "PIPELINING", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: Found extension "PIPECONNECT", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: Found extension "AUTH", arg "CRAM-MD5 PLAIN LOGIN"
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: Found extension "CHUNKING", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: Found extension "STARTTLS", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: Found extension "PRDR", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:40 | DEBUG SMTP: Found extension "HELP", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:40 | STARTTLS
INFO   | jvm 1    | 2025/12/19 19:44:40 | 220 TLS go ahead
INFO   | jvm 1    | 2025/12/19 19:44:41 | EHLO ENR-GTC
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250-mail.smtp2go.com Hello ENR-GTC [77.62.202.212]
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250-SIZE 52428800
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250-LIMITS MAILMAX=5000 RCPTMAX=50000
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250-8BITMIME
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250-DSN
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250-PIPELINING
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250-PIPECONNECT
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250-AUTH CRAM-MD5 PLAIN LOGIN
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250-CHUNKING
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250-PRDR
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250 HELP
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Found extension "SIZE", arg "52428800"
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Found extension "LIMITS", arg "MAILMAX=5000 RCPTMAX=50000"
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Found extension "8BITMIME", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Found extension "DSN", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Found extension "PIPELINING", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Found extension "PIPECONNECT", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Found extension "AUTH", arg "CRAM-MD5 PLAIN LOGIN"
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Found extension "CHUNKING", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Found extension "PRDR", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Found extension "HELP", arg ""
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: protocolConnect login, host=mail.smtp2go.com, user=*******, password=<non-null>
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Attempt to authenticate using mechanisms: LOGIN PLAIN DIGEST-MD5 NTLM
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: Using mechanism LOGIN
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: AUTH LOGIN command trace suppressed
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: AUTH LOGIN succeeded
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: use8bit false
INFO   | jvm 1    | 2025/12/19 19:44:41 | MAIL FROM:<***>
INFO   | jvm 1    | 2025/12/19 19:44:41 | 250 sender ok.
INFO   | jvm 1    | 2025/12/19 19:44:41 | DEBUG SMTP: sendPartial set
INFO   | jvm 1    | 2025/12/19 19:44:41 | RCPT TO:<***>
INFO   | jvm 1    | 2025/12/19 19:44:42 | 250 Accepted <***>
INFO   | jvm 1    | 2025/12/19 19:44:42 | DEBUG SMTP: Verified Addresses
INFO   | jvm 1    | 2025/12/19 19:44:42 | DEBUG SMTP:   ***
INFO   | jvm 1    | 2025/12/19 19:44:42 | DATA
INFO   | jvm 1    | 2025/12/19 19:44:42 | 354 Enter message, ending with "." on a line by itself
INFO   | jvm 1    | 2025/12/19 19:44:42 | Date: Fri, 19 Dec 2025 19:44:40 +0100 (CET)
INFO   | jvm 1    | 2025/12/19 19:44:42 | From: ***
INFO   | jvm 1    | 2025/12/19 19:44:42 | Reply-To: ***
INFO   | jvm 1    | 2025/12/19 19:44:42 | To: ***
INFO   | jvm 1    | 2025/12/19 19:44:42 | Message-ID: <***>
INFO   | jvm 1    | 2025/12/19 19:44:42 | Subject: Test Email
INFO   | jvm 1    | 2025/12/19 19:44:42 | MIME-Version: 1.0
INFO   | jvm 1    | 2025/12/19 19:44:42 | Content-Type: text/plain; charset=utf-8
INFO   | jvm 1    | 2025/12/19 19:44:42 | Content-Transfer-Encoding: 7bit
INFO   | jvm 1    | 2025/12/19 19:44:42 | X-Priority: 3
INFO   | jvm 1    | 2025/12/19 19:44:42 | 
INFO   | jvm 1    | 2025/12/19 19:44:42 | Test Email
INFO   | jvm 1    | 2025/12/19 19:44:42 | .
INFO   | jvm 1    | 2025/12/19 19:44:42 | 250 OK id=1vWfT0-FnQW0hQ0iyu-GxDf
INFO   | jvm 1    | 2025/12/19 19:44:42 | DEBUG SMTP: message successfully delivered to mail server
INFO   | jvm 1    | 2025/12/19 19:44:42 | QUIT
INFO   | jvm 1    | 2025/12/19 19:44:42 | 221 mail.smtp2go.com closing connection
4

....seems to be a thread context issue

I replaced

emailExecutorSend.execute(() -> {
    sendEmailToProfile(subject,message, listeEmail, listeUser);
});

with

gatewayContext.getExecutionManager().executeOnce(
        () -> sendEmailToProfile(subject,message, listeEmail, listeUser)
);

but I still have the connection issue
As a side note, my gateway has only one IP address

5

Comparing Wireshark captures might be interesting.

6

InetAddress addr = InetAddress.getByName("mail.smtp2go.com");
logger.info("SMTP IP = " + addr.getHostAddress());

print a reachable IP Address...

I will see if I can install wireshark...

7

The error isn't saying it's an unreachable address, it's saying the connect() operation timed out.

Usually that translates to a TCP SYN packet with no answer.

8

I disabled IPv6,

perhaps
wrapper.java.additional=-Djava.net.preferIPv4Stack=true
will help ?

Not sure I can install wireshark :frowning:

9

image
image1213×600 41.3 KB

10

What value? any why is something called "retryDelaySec" being used for the timeout?

11

value is set to 60

12

That's 60 milliseconds.

13

something go wrong when I change from gatewayContext.getSmtpManager().sendEmail

I set it to 10000, I don't have the tcp exception, I will check if the mail is received !

Yes, Good Shot erronous parameter name with a two small value...