CANNOT SEND MAIL MESSAGE

We are seeing the exact same problem. More details to follow.

YES!!! Someone please help?

Assuming this happens when connected to cellular, make sure your SMTP server is allowed by your cellular carrier, i.e. add one that your carrier accepts. Settings > Mail > account > SMTP

Greetings,

In most cases you will need to use the SMTP server that the ISP provides for the service that you are using, if you are using WiFi. If you are home, use that one, at work, or school, then contact your IT folks. Most all ISPs will not allow other SMTP servers to be used, only their own.

You can reference multiple SMTP servers in your phone. If you are using non-WiFi, like 3G, then you will use your carrier provided SMTP. You can also plug in the SMTP of your email program, like smtp.me.com, smtp.mac.com, cwmx.com for AT&T, etc.

Cheers,
M.
***

My problem is similar though not exactly the same. Has only occurred since updating software for iPhone 3G this morning. I can receive emails without problem, but no longer able to send them - had no issues with this previously.
Error message says 'The connection to the outgoing server ... failed etc etc'. Have tried restarting the phone. Don't particularly want to have to re-enter the relevant server information etc .. any suggestions anybody??

I'm having the exact same problem now that I just got an iphone 3GS. Doesn't happen with all emails I send, but many. Can someone help with settings instructions for those non-teckies of us?

I'm having the same problem since updating my phone last night - I can receive, but not send. Would really appreciate some help 🙂

If your having issues sending mail, try changing the outgoing host name to cwmx.com (For ATT customers). Leave username and password blank.

This usually resolves any sending issues on the iphone.

Hope that helps.

As mentioned in this thread, have you checked your SMTP settings?

I am also in a similar boat.

Recently upgraded my phone (iphone4) to iOS 4.1

Now it only intermittently sends emails over 3G, often just sitting there with the spinny wheel and saying 'Sending' for ages, but is fine over wifi. Including wifi provided by my service provider, Vodafone, in the UK. SMTP settings match those provided by the provider (and I have even reconfigured my account on the phone to check), so there is no obvious reason for it not to work.

Anyone else seen this? It feels like the phone is somehow not quite connecting with the server properly and then timing out.

I had this same problem. Could receive messages, but not send. Go to settings-->mail, contacts etc-->choose the account in question then delete account. After, go back and add the account back. I have Yahoo and they apparently changed some of their settings in their outgoing mail server. Once I deleted the account and re-added, everything worked fine. Try it.

Tried this, I still get intermittent service. Sometimes, I can send mail. Sometimes, it doesn't work. This is sat in the same location with no changes to the config, just that sometimes the phone seems to get itself stuck.

Even restarting the phone doesn't seem to help when it gets like this - I just have to wait until it decides to start working again. Very frustrating and hard to tie down - and just the sort of thing that if I took it in to get tech support, would work fine when in the store!

thanks kelly - working fine again!

Thank you. This solution worked on our 2 iphones. The problem began when we synced with Microsoft Outlook 2007.

I think I ca clarify the solution by adding the folowing. Go to settings, then mail and click on the account. Go to SMPT and tap it. That brings up a screen with the primary server and the other STMP servers. Turn on the servers for the accounts on which you have an email.

Similar issue: I cannot send mail over 3G using our work smtp server (using Groupwise IMAP), but once I use my home wifi instead of 3G the messages go out just fine, no change in settings needed.

To me this looks like either AT&T doesn't allow me to contact our smtp server, or our work smtp server doesn't allow incoming connections through AT&T. Is either of these likely, or am I missing options? Any suggestions on settings to try/phone calls to make?

As an aside, this started after upgrading from 3G to iPhone 4, using the 'restore from backup' to get all settings on iPhone 4, but I have since deleted all mail accounts, restarted, reset network settings, and re-added all mail accounts. The problem persists.