Can't Send Email on iphone

Here's what worked for me - I filled in the optional user name and password fields in the smtp settings and switched SSL off.

I wanted to use my AOL account on my iPhone. I've the same problem as the other users - I can't send e-mail with my iPhone via my AOL account. The handset has limited settings to alter - how can I use the phone?! I don't have access to I.T. experts - that's why I chose the iPhone for my mobile AOL mail. This is a serious problem in my opinion. Apple appear to have misrepresented the iPhone as being both easy to use and suitable for AOL mail users.

My experience is that this is an Exchange server issue with the way the SMTP connector authenticates the iPhone users credentials. Try changing the SMTP connectors authentication from "Windows Authentication" to "Password sent in clear text" (make sure to stop and start the SMTP connector) -- no changes are necessary on the iPhone.

I had the same problem. I had to add /exchange to the end of my server name (mail.server.com/exchange) then it worked perfectly. You also need to make sure that your smtp port on the exchange server matches the iphone's smtp port and that your firewall won't block it.

I have tried all of these tsuggestions. Unfortunately none of them have helpen. My settings are correct, i tried /exchange, i did it all and nothing. I am on the road ALOT and my business will suffer for this.

Try to turn off the Wifi connection and just send the email under EDGE. It is the only thing that has worked for me. But this is pretty stupid work around.

I had gmail email and it was a problem with outgoing mails but then I found SMTP.com and now it's cool! Works very good

i was having the same problem with the yahoo small business account.  You have to set it up as IMAP, not POP, to see all the folders.  However, I have not been able to find that info on the yahoo site.  So, if you don't care about seeing all your storage folders, you have to set it up as a "other account."  Do NOT select "YahooMail" as your service.  Set it up as a POP account, turn ON SSL for outgoing mail, smtp.bizmail.yahoo.com at port 465, but turn it OFF for incoming mail using pop.bizmail.yahoo.com.  Again, you won't see your storage folders with this as it has to be set up as IMAP. 

/exchange worked for me too!! Finally an answer, thanks!!

I have the same problem, i fix that, first turn off sync Mail accounts in iTunes and remove the mail accounts in the iphone, then with openss from my windows WinSCP set permissions /var/mobile/Library in the folder "Mail" to 777, now itunes can sync yours mail accounts, then go to iPhone open icon Settings into then go to "Mail, Contacts, Calandars" option and go Accounts "xxxx" -> SMTP here set the username and password for ur account and delete other SMTP Servers and if you have another account with other server you just add.

Settings > Mail, Contacts, Calendars > (select your email account) SMTP > (Click on Primary server) > Make sure your Username and password are entered here.
try that. ;)

FIND YOUR SOLUTION FROM APLLE.

HERE IS YOUR SOLUTION

www.apple.com/iphone/prob237ji32/solution

Thanks

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this problem cannot sent email one or more receipient invalid

It's been my experience that this is an Exchange server issue with the way the iPhone sends Windows users information. If you can access the Exchange server -- When I had this issue I tried changing the SMTP connectors Authentication settings from Windows Authentication to Clear Text Passwords and was done with this problem.

I had the same problem with AOL iphone. I am a Mac User. I went to my account settings in Entourage (Outlook), accessed the account, clicked Advanced Options and checked the SSL box and changed the SMTP Authentication Box from Receiving Mail Server to User a/c and Password. You need to check the box allowing Mac Keychain to access always. I was asked for one confirmation on the computer when I sent a test message and since then it sends automatically as before and I can now send from the phone when not in wireless range.