Change SMTP port to 587 doesn't work

Hi,
my ISP blocks port 25, ok and no problem - not for the iphone.
When i change port 25 to 587 it checks the config - works.
After i gone back in the menu the account list, to save the settings, (still in the settings) and go again to the SMTP settings, port 587 has changed to port 25.
Using iOS 4.
Some ideas?
I think the "smash the iphone" method should be the best - self created SSL certs make some problems to the mail.app and so on - very bad. Works under OS X but not on iOS. Never mind, it's ok if i could save atm the port 587.
Cheers

Still the same...
Port 465 changes also back to 25.
My provider @ home needs port 25, ever other port won't work.
Outside i have to use port 465 or 587, but these ports don't be saved - i could only send 1 mail (wich is currently pending to send) after change the settings.

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Help!! Cant send email how change my outgoing smtp port to 587 stuck on 25

Im on OSX 10.1.4. I go to Mail, Preferences, Account, Select my email account, Select Edit, Select Account Options.
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When I try to send mail a message says smpt port timed our port 25. I called my internet provider and they told me to change my outgoing port to 587 but I cant find where to change the 25 to 587.
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So there's no way to send with other ports? You HAVE to use port 25?
Sure there is - talk to every mail administrator of every domain you might ever want to send mail to and have them reconfigure their mail servers to listen on some arbitrary port number that you define. Wait for them to do it (it shouldn't take them too long), and then you're done.
Oh, no, hang on a minute... none of them are going to do that, are they?
But that's what you're asking for - you're asking for them to accept mail on some non-standard port number just so you can get around Verizon's mail blocking.
There is a reason why standard port numbers (defined by IANA) exists - just so that everyone's talking on the same page (or at least in the same chapter of the same book). You can't arbitrarily pick a port number and expect it to work unless both sides of the connection know to use it. You know port 25 works for SMTP because that's the standard. You can use any port number you like for your own mail because you can configure your own mail client to use a non-standard port, but you can't convince the rest of the world to follow suit (at least not without good reason).
In this case your options are to relay your mail through Verizon's servers, upgrade to their business plan (which supports hosting your own mail server and doesn't break the user agreement), or setup another mail server somewhere else that you can relay your mail through.

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Change SMTP port to 587 doesn't work

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