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SMTP/POP3 servers.

Discussion in 'Internet, Connectivity and Communications' started by Baba O'Riley, Nov 20, 2006.

  1. Baba O'Riley

    Baba O'Riley Gigabyte Poster

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    OK, I've never had a POP3 email account that wasn't supplied by my ISP so I've never encountered this problem, but the solution was a real surprise.

    Over on another forum I visit, someone with a Wanadoo email account but was with a different ISP was having trouble sending mail to the SMTP server. Pulling mail off the POP3 server wasn't a problem. It turns out he should have been using the SMTP server of his ISP, not Wanadoo/Freeserve/Orange. That to me seems mucho weirdo but I can't really explain why. If I play it out in my head, it works, but I don't think it should.
     
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  2. Sparky
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    Sparky Zettabyte Poster Moderator

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    Port 25 blocking is common with some ISPs. If you try to send with a different email domain (not the one your ISP gave you) through your ISPs SMTP service expect that to be blocked as well! 8)
     
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  3. Baba O'Riley

    Baba O'Riley Gigabyte Poster

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    Thanks Sparky, but if I understand you right, that is the opposite of what is happening in my post I think.
     
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  4. hbroomhall

    hbroomhall Petabyte Poster Gold Member

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    Sparky is right. This is a deliberate policy on the part of most ISPs to try and reduce the misuse of email.

    Harry.
     
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  5. Baba O'Riley

    Baba O'Riley Gigabyte Poster

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    This guy says he is sending email through his ISP's (Sky broadband) SMTP server using a Wanadoo email address and it's not being blocked. Isn't what you're saying that it should be blocked because his email domain is not supplied by his ISP? That's what's confusing me.
     
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  6. Stoney

    Stoney Megabyte Poster

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    You'll probably find his ISP is using a smarthost to filter out what's being sent to the main servers.

    Enter the guys email address in the email section of here and it'll tell you what's happening when it reaches the mail server. Should enlighten you a bit.
     
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  7. Boycie
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    Boycie Senior Beer Tester

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    Baba,

    The only explanation I can think of is Sky and Orange have some *partnership* or relationship of trust.

    When using an ISP's SMTP Server with another domain, I have always had the <550 Relay not allowed>.

    There is a way around this; I got fed up with different e-mail addresses, using webmail/ mail client depending on where I am and signed up with Fastmail. I can use my e-mail client wherever because I connect to their SMTP server via whatever ISP I am on the end of.

    Si
     
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  8. Baba O'Riley

    Baba O'Riley Gigabyte Poster

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    Thanks for the input guys.:D
     
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  9. Sparky
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    Sparky Zettabyte Poster Moderator

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    Yeah, I used to be able to send through my ISPs SMTP server for my work email (email was pulled down via POP3 from my works server) but then it got locked down and I got a 550 error as boyce has explained.

    With some ISPs you can still get away with it though :biggrin

    In some cases you cant use another SMTP server other than the one your ISP has provided but sometimes you can do a few tweaks in Outlook to get around it. Not a reliable solution 8)
     
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  10. hbroomhall

    hbroomhall Petabyte Poster Gold Member

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    No - this isn't quite what is happening.

    First - there is no arrangement netween Sky and Orange/Wanadoo. And Sky broadband doesn't block outgoing SMTP.

    What is happening here is that he is attempting to use the Orange SMTP from a Sky address. Orange has no way of knowing who he is so it says 'no'.

    In the case of POP3 pulling, many ISPs allow that remotely because POP3 trivialy includes a method of authenticating. However, not *all* ISPs allow this. And some only do it if some special action is taken.

    Harry.
     
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  11. Boycie
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    Boycie Senior Beer Tester

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    You can always rely on Harry for confirmation :thumbleft

    Baba, I would recommend Fastmail for exactly what you have mentioned in this post.

    Si
     
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  12. Bluerinse
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    Bluerinse Exabyte Poster

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    Well this is an issue for anyone that has their own email domain ie anyone that doesn't want to use name@isp.com - this is a very common situation for companies, as they have there own web site and or email domains, for example pete@bodgeduppc.com.

    As has been said by Harry and others. ISP are clamping down on people misusing emails (spamming) and having open relay mail servers which can be used by spammers. In an effort to prevent this they do not allow emails to be sent (SMTP) to any other email servers only theirs.

    Not many SMTP servers require authentication, whereas POP3 ones do require a username and password.

    The workaround is to use your ISPs mail server as the outgoing server and your own email server ie pop.bodgeduppc.com as your incoming email server.

    That is what is recommended by the hosting company I use here and it works with all the ISPs here on the Gold Coast.
     
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  13. Baba O'Riley

    Baba O'Riley Gigabyte Poster

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    OK thanks guys.:thumbleft

    Boyce, I'll keep your recommendation in mind but I'm not having these problems so I've no need of it for the moment.

    Thanks again.:D
     
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