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Bypass email blockade.

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Many ISPs do not allow emails be sent through them where the smtp is set to other ISP. It is very inconvenient while travelling. How can we bypass the blockade?

33 replies

by healer

I use my laptop in a public library. I can receive emails but I can never send emails.

Say for example if you take your laptop to a friend's place whose network connects to an ISP other than yours. Very likely you will never be able to send email.

I do not think it has anything to do with proxy. Could you please explain a bit more of your response.

by seanferd

1. Use an email service - Yahoo, Google, whatever MS calls their offerings these days - that is not linked to an ISP. In anticipation, I will note that I mean a generic Yahoo account, not an SBC/AT&T Yahoo account or similar.

If the mailserver doesn't belong to an ISP, it will not balk at your IP address.

2. Proxy - Use a proxy server to reach your ISP's mailserver, where the proxy has an IP address within your ISP's IP blocks.

3. Additional - VPN into your home computer (or whichever computer normally uses this ISP account, if you are allowed) to send mail.

by tobif

Many ISP block outgoing traffic to SMTP (TCP port 25) except to their own mail servers. (unless the sender is a known good mail server)

This way, they protect their network from becoming the originator of spam, sent directly to mail servers of the addressees.

The root to the problem is that port 25 for long was used both for submitting mails from users to their mail server and for forwarding mails from the outgoing server to the incoming server of the recipient. And, for forwarding, no login is needed! (By the way, you may still find servers for submission of mail, where login credentials are not needed!)

Recently, most email providers have set up an additional entry point for submission of emails (with use of login and, possibly, encryption). Typical TCP port number may be 465, 587 etc.

So:
Check with your email provider what settings they offer for email submission.
Once you update your client settings, you'll be able to send email from most places.

Workarounds:
- webmail access to your home accound.
- If you activate pop/smtp access on gmail, then you can use that from your client. With some configuration, it is even possible to indicate your ordinary email address as the sender of the mail! (Oh, and gmail via pop/smtp enforces encrypted communication, which is good, but you need to configure it correctly.)

by healer

I suppose the problem is not with our own ISPs. It is the ISP of the network wherever we happen to be blocking the outgoing emails. Do you think so? Please comment!

All my outgoing emails are using port 587 SSL, incuding those with GMail. However they are still blocked. I am going to ask my ISP anyway.

by tobif

It's the ISP of where you happen to be, who protects their network form becoming the source of spam this way.

by healer

I have GMail set up as smtp/imap using TLS/SSL and it didn't work. My HotMail didn't work either.

Are you suggesting GMail and HotMail should send out emails from a mail client wherever it may be?

by tobif

Outlook express behaves a bit funnily. When you select "use tls", it automatically changes the port numbers, and you need to afterwards edit them to the right values.

Generic settings are found on this page: http://mail.google.com/support/bin/answer.py?hl=en&answer=13287
There are specific step-by-step instructions for most popular mail clients, just have a look.
Oh, and don't forget that you need to activate pop access in your gmail account. Further, make sure your client won't delete emails on the server (unless you really want mails to disappear from the webmail client when they've been downloaded to your email client).

As far as I know, Hotmail doesn't offer pop access. I've read something about a "hotmail connector" but I don't know much about it.

In fact, most providers of free public email only offer access via web. The reason is, of course, that the web interface allows them to display advertising, i.e. revenue generation.

by healer

something that could be done without so much extra work because visits to such places are usually very brief, casual and sometimes unexpected and unplanned.

It doesn't even work with GMail.

by seanferd

I don't know how an ISP could be expecting certain IP addresses in relation to a non-ISP-branded mail service. The ISP would essentially have to block all access to GMail.

Have you tried the webmail interface? (Yeah, I don't much care for webmail, either.)

by healer

But I believe it should work because this is how other people access HotMail or GMail in the library.

There must be a header in the message saying the message is heading to another outgoing mail server.

I suppose web mail like GMail and HotMail would have different headers in the messages.

by oh smeg

Is the Outgoing Mail Server on your E Mail Application. When you say use Optus as your ISP and you go to a place with Bigpond as their ISP you can not connect to the Optus Mail Server to send your E-Mail.

You can however go into the Proprieties of your Mail Client and alter the Outgoing Mail Server and send them through what is then the Local ISP Mail Server. I have several people who regularly travel Overseas doing Medical Work for several places who have this down to a fine art, When they check into their Hotel they get the Outgoing Mail Server details and set their Mail Client to that.

Of course others who are not technically bright just use G Mail as a Web Interface and do not use a Mail Client till they return to Base and then download all of their stored mail to their computers.

That's the way things work here in AU and surrounding regions. ;)

Col

by tobif

And it seems au is still stuck in the old style. Maybe they hope this can help them with branding...
http://help.optuszoo.com.au/help/dial/faqs/email

But then your traveling friends might be helped by using gmail as a transit for outgoing mail while on the move...
smtp/pop (with ssl and different tcp ports)
http://mail.google.com/support/bin/answer.py?hl=en&answer=13287
Custom from address
http://mail.google.com/support/bin/answer.py?hl=en&answer=22370

by oh smeg

They don't use a Mail Client when away they use a Web Application to access their Mail.

Actually it would be just as easy to Open a Browser and access their ISP's Mail Server and use their Send Function from there as well when I think about things.

I have a guy who regularly travels to the Trouble Spots like the Solomons Islands, Bougainvillea, Timore and so on. As he's a Surgeon I'm not trying to teach him how to play with computers for fairly obvious reasons. Like [b]he will Blackmail me[/b] by first making an incision and then hitting me to do some computer repair work.

I don't need to encourage him at all so I try to avoid getting him upset. :D

Col

by healer

though it doesn't help bypass the blockade.

by healer

I am not too sure whereabouts in Australia you live. In my area the council library and MacDonalds provide free Internet access. I doubt the librarians and the MacDonalds staff can tell you the details of the outgoing mail server.

You reckon all the hotel people would not hesitate to give these sort of details to clients?

by oh smeg

When you check into a Hotel and for that matter every time I have traveled within AU all I do when I check into any Hotel is ask the Desk Clerk for their Mail Server Details. Some can help you immediately some just hand you a printed Flier and some get their Tech to call you. Depends on the size of the Hotel and how well rated it is though. The Maccers and Libraries are not any help so just open your Web Browser and navigate to your ISP's Web Mail Site and work from there.

As I'm lazy I just Book Mark these Sites and then when I want them open my Favorites and go. ;)

Col

by tobif

don't open SMTP submit ports.
They're protecting you from blackmailing.

by tobif

Believe it or not, but they send mails all over to port... 25.

And even the AU operator mentioned above has instructions on their help pages about where companies could turn to open up port 25 for their mail servers...

And, visiting a webmail service isn't any problem at all.
Further, if you enable smtp/pop access to your gmail account, you can, most probably, set up your client to send mail via gmail from all over the internet. And that's ok with your ISP, since they know that gmail will filter spam and demands logon credentials before anything is accepted.

In addition, gmail was among the first mail providers to enforce encrypted connection for pop/smtp/imap.

by healer

at a browser from the ISP's mail server will you use? I am not clear of what you said.

by oh smeg

Go to the Bigpond Home Page Log in and then navigate to E Mail In Box.

http://www.bigpond.com/internet/mybigpond/

From there you can read your received E-Mail and send from there without opening your Mail Client.

If it's Optus go to the Optus Home Page

https://webmail.optuszoo.com.au

Log in and you are at your In Box. From there you can Compose a new E Mail and send it. Probably easier than constantly messing with your Mail Client every time you go to a new Hotel.

All of the ISP have their own Web Mail/E Mail Web Site and you can access your E Mail from there and work as required.

Of course it doesn't download to your computer but when you get home or after you have dealt with any E Mail you can open your Mail Client and Download any Messages. You will have to open your Web Mail Page again and copy your Sent Items to your In Box so you can download them to your computer.

Col

by tobif

Good: You can still receive emails to your client, regardless of where you are.

Bad: sending emails from your client doesn't work from "alien" networks. Yes, you can still use webmail access to send messages. Just don't forget that you don't automatically get a copy of sent mail to your own computer.
(If I want to keep the text, I put my own address in the CC field, when sending from my mail providers webmail.)

by oh smeg

The Mail Header should be the same as you would normally send as it's originating from your ISP's Mail Server not the Access Points Web ISP.

Col

by oh smeg

But you can copy the Sent Mail from the Web Mail folder to your In Box and download it to your Local computer.

However CC it to yourself is probably just as easy.

No matter what you should always keep a copy of everything that you send just to be safe. ;)

Col

by tobif

But my email provider offers a very basic web-interface. It just sends off the mail. Full stop.

I can't find any developer credits, but it is just a quick-hack web frontend for displaying the contents in your pop account and sending off emails via smtp. It will memorize your name and banner text, but not even any address book.

by oh smeg

Even Singtel doesn't provide such Basic Web Mail Apps here. ;)

Actually I haven't seen anything like that for ages even the cheap Dial Up ISP's here provided better. Granted they used a Nix System but even the Red Hat 7 offered better than that. ;)

Col

by healer

with a hotmail connector. It has been available to me on Office 2007 and Office 2010.

I have yahoo email forwarded to other email accounts too. Anyway I always try to avoid webmail if I can.

Are you saying GMail POP should encounter no blockade?

by tobif

The pop / smtp is authenticated and encrypted, so the ISPs don't have any problem with it.

They use other ports, that ISPs don't need to block.

by healer

next time when I go to the library for I have already changed to to POP/SMTP with SSL/TLS. I will let you know.

by oh smeg

You want to use a Mail Client while away from Home/Office and not use anything else but you want to send E Mail from Free Access Points like McDonald's, Starbucks and so on.

Sorry it's not going to happen that way. If you are unwilling to use Web Mail your only other option is to get a Unwired ISP Connection from one of the many ISP's around. This normally consists of a USB Dongle which you pay for the service and plug in when you want to send mail.

It will naturally have to be from the same ISP as your Fixed Line ISP so you do not have to change the Out Going Mail server and obviously it's only going to work while in AU so if you go overseas it's not an option.

If you want to use your Mail Client that is your only option while away from the Office/Home. ;)

Col

by healer

the local council library is using Unwired. Certainly I have not used their smtp server in the settings because I don't have the details and authorization.

I've just checked on http://www.unwired.com.au/support/umail.php?p=unwired_outlook. It looks like we need to have an account with them in view of the outgoing server setup requiring authentication before we can use it.

Moreover, Outlook unlike Thunderbird which allows us to set up multiple outgoing servers so that we can change on the fly.

by tobif

Before my email provider added a different port for "SMTP submit", I had 3 extra accounts in Outlook Express/Window Mail. I only used them for sending emails and had (on purpose) non-working settings for incoming email.

So, when I was in a location where outgoing connections to port 25 where blocked, I simply changed the sending account to correspond with my current internet connection.

Now I'm down to one extra. In case my normal provider should be temporarily down, I can easily switch over to submitting mails via gmail (directly from my client).

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