I want to send an email without using SMTP protocol. Is that possible to implement using Java? Since, my remote machine does not have access to google, yahoo and other accounts. and even my office mail can not be configured using SMTP server due to some security issues. Is any other way to send an email from remote machine.
The JavaMail section at java.sun.com lists many third party products that plugin to the JavaMail API. Hopefully one of those will fit your needs but I can't be more specific because you don't say what non-SMTP sending options you have open to you.
You could setup Your own SMTP server on remote machine, IMHO, it is better than incorporate it into program directly.
I want to send an email without using
SMTP protocol. Is that possible to
implement using Java?
With Java you can implement any Layer-5 network protocol.
ALL mail servers using SMTP to receive messages. At any time you have to connect with SMTP to the destination mail server.
If you cannot get out from local network to the Internet with some services you will need a proxy or network tunnel to connect the destination.
Related
I have a Java application which uses Javamail (v.1.5.4) for send and review mails into a POP/SMTP mail server. This application must run in our coporate network, where we have a proxy (f*ck!) that blocks my requests. I have googled possible solutions and Javamail says that we can use SOCKS5:
Q: How do I configure JavaMail to work through my proxy server? [updated!]
A: JavaMail does not currently support accessing mail servers through a web proxy server. One of the major reasons for using a proxy server is to allow HTTP requests from within a corporate network to pass through a corporate firewall. The firewall will typically block most access to the Internet, but will allow requests from the proxy server to pass through. In addition, a mail server inside the corporate network will perform a similar function for email, accepting messages via SMTP and forwarding them to their ultimate destination on the Internet, and accepting incoming messages and sending them to the appropriate internal mail server.
That solution is not valid for me, so I have to look for new alternatives. Some people say that they implements a custom SocketFactory, but I am not sure if that is enough. Someone has tried?
Another possible solution could be use another library, but I don't find anything that could avoid this proxy.
Has anyone treat this problem? How do you solve it?
Summary
Problem: I have to send and read e-mails in a Java application, but my proxy blocks the requests.
What I have tried? Using javamail, I have tried to use SOCKS5 solution, but with no effect.
What I am looking for? A way to avoid this proxy. Someone tells about a custom SocketFactory(but I am not sure if this is valid). I don't find any alternative to Javamail.
Regards!!
Actually JavaMail does support SOCKS proxy, just not authenticated proxies.
That solution is not valid for me
But you don't explain why.
There's another way of configuring Java Mail with SOCKS proxy (even authenticated one) that doesn't involve configuring your own socket factory. There's an open source library called Simple Java Mail (full disclosure: I maintain it), which is really simple to use:
new Mailer(
new ServerConfig("smtp.host.com", 587, "user#host.com", "password"),
TransportStrategy.SMTP_TLS,
new ProxyConfig("socksproxy.host.com", 1080, "proxy user", "proxy password")
).sendMail(email);
However, if your proxy is actually an HTTP proxy, you're out of luck and you will need to resort to something like Corkscrew or connect.
Although it's not a programmatic solution, the cleanest way would be to check if your company has an internal mail server and use that one to send your emails. It doesn't require using SOCKS or proxies, just configuration.
A nice side-effect may be that emails sent in name of your company are also sent by your company. If the mail administrators have set-up SPF records correctly, it greatly reduces the risk of your emails ending up in someone's junk / spam folder.
Using your own mail server is generally the best solution, but if you don't have your own mail server the JavaMail FAQ describes other solutions, such as using Corkscrew or connect to work through your web proxy server.
As per the latest release of Javamail API 1.6.2 , JavaMail supports accessing mail servers through a web proxy server and also authenticating to the proxy server. See my answer here stackoverflow.com/questions/36278073/how-to-let-javamail-support-http-proxy/52855090#52855090
I need that the application be able to track the smtp host by the email account, because it have to be capable to work with any mail account.
There is a way to do this?
Short answer is: no you can't.
To some degree you can get a smtp host from an email address, but not all email providers have an smtp server, and most email providers will require user specific authentication when using their smtp servers.
It's still possible to send mail from your computer when your email provider doesn't provide an smtp server because most Internet providers also provide you with an smtp server. You can't determine this smtp server based on someone's emailadres.
If your application always has to be able to send mail I would look into a free smtp server somewhere, or host your own.
I'm using a Java class that sends mails using JavaMail. I really need to use it even though authentication is not yet implemented. Basically it just has SMTP hostname, port, from, to, subject and body.
I need a SMTP server for it. Most of the ones I've tried use authentication.
Does anyone know maybe a local smtp server for ubuntu?
It doesn't have to be very complex/secure because it's just a proof of concept.
Something like sending a text email from my gmail account to my yahoo account. Thanks
I checked that I am not able to access the pop 3 port and imap port. I think I can only access via https webmail.
So for this case how do I actually connect to the microsoft exchange server and read the emails inside using java mail can anyone provide any specific code samples to achieve this?
Connecting to Exchange via OWA sounds like its going to be difficult; here's a post which deals with at least the authentication side of things.
In any event, you can connect to an Exchange server via IMAP if the IMAP service is turned on. Check with your server admin to confirm the service is running. If it is running, see this other post for how to set connection parameters.
I have read that to send email in Java I need to obtain my ISP's SMTP address, but if I am intending to host my web app online, will this be my hosts ISP SMTP address?
EDIT: So I need to find out my clients ISP's SMTP address and send via this?
JavaMail is the built-in API for e-mail.
Ask your ISP if the host runs sendmail or equivalent locally (the web server host). It may be an advantage to hand off to sendmail as early as possible. In other words, try "localhost" as the SMTP server name.
Why? JavaMail is a simple SMTP client. It doesn't deal with DNS MX records. It doesn't have a built-in capability to queue mail if the SMTP server is unavailable. There's the default Java infinte DNS cache so that a DNS change to the SMTP host won't register with your app (tunable, but one more tuning to do). These are things that a local sendmail (or equivalent) process will do.
So if you can hand off the e-mail to a local sendmail/equivalent, that may improve e-mail delivery reliability. Assuming the local sendmail works, of course. It's how we configure some in-house apps that uses JavaMail to send mail and fixed all the above problems.
No, unless your webhost is the same as your ISP or your webhost also offers SMTP services.
In response to your edit, yes you need your ISP's SMTP address by the sound of things.
It will be the SMTP address you want to forward email through.
If you want to send email through your ISP account then it will be that SMTP.