Cannot send email - Invalid address?

Alot of ISP's will only let you send mail if you are connected to their network, this is to reduce or stop them being used to send spam mail.

The problem with the iPhone is it can use WiFi at home but it can also use your phone providers network as well which leads to this problem. If your ISP will only let you send mail when connected to them (e.g. via wireless at home) you will need to find another email provider to send your mail through (e.g. HotMail or Google Mail)

Ok...GOT IT TO WORK...

What needs to be done (Please note I am using Sympatico as service provider)...

a) Go to setting and in e-mails settings, under your account, disactivate your primary SMTP server...and in second service provider, activate your Rogers SMTP server...

b) Flush out all e-mails you may have tried to send before...

You should be fine then...

iPerks

I have a similar problem - except my service provider confirmed that i'm using the correct pop & smtp settings. I've noticed though that the problem is limited to the 3G network only - when i'm on wi-fi the invalid emails suddenly become valid again, which has me thinking it's a carrier issue.

argh!

The same thing happens to me; i reply to an email and i get the message "cannot send mail, invalid email address". It happens whether I'm using the 3G network or WiFi. After this happens it usually gets stuck "checking for mail". At that point I have to reboot.

I think I want my old Motorola phone back. The iPhone has been nothing but frustrating to say the least!

i got the same error using gmail. it turned out to be the 3G network. once i read the post above i switched over to the Edge network and voila...my outbox purged my "invalid emails." go figure. btw, i've never had this problem and i've been using the phone for 4 months now.

I am having the same issue when replying to an email that was sent from the yahoo.ca domain.

iPhone pop-up says 'Cannot Send Mail' and 'One of the recipient addresses was invalid'

I can reply to the same message just fine on my Mac.

Is there a bug in the iPhone software that it thinks 'yahoo.ca' is an invalid address ???

Texas33,

Could you give the exact wording of the error message you receive? The error I am familiar with is:

"Cannot send mail. One of the recipient addresses was invalid."

I've seen this issue occur in two different instances. The most common is due to security settings on outgoing server you're using; it requires you send over a particular network to access their server, and sending over anyone else's network besides theirs results in this error. So, it's a provision your email provider has made.

The other time I've noticed this (of which I have experienced personally) is due to allowing the iPhone's autofill to complete the email address you're typing. Usually another error precedes the error message above, stating: "Invalid Address. 'xxxx@me.com' does not appear to be a valid email address. Do you want to send it anyway?". If this is the case, ignoring the autofill and completing the entire email address manually should work around this issue. For replies, you would have to try erasing the email address in the address field and re-enter it manually I'd imagine.

Hope this helps,

Raleigh

This began on my iphone yesterday. THe reason of it being a 3G problem is not right. I do not live in a 3G network and it started doing this yesterday. ( I have had this phone for 2 months with no problems till now) It only happens on replies though. I have rebooted, synced, etc. and nothing will work.

Ditto here...and also very frustrated........same message of incorrect address...
I have tried WiFi, Edge and 3G and none works 4 me...

And i have confirmation my set-up is fine.........

All I can see is we don't get much support in getting this issue resolved! And I can see the number of frustrated user is just growing as well...

Still loking 4 a solution...if it ever comes

iPerks

Ditto here...and also very frustrated........same message of incorrect address...
I have tried WiFi, Edge and 3G and none works 4 me...

And i have confirmation my set-up is fine.........

All I can see is we don't get much support in getting this issue resolved! And I can see the number of frustrated user is just growing as well...

Still loking 4 a solution...if it ever comes

iPerks

I have the exact same problem!

Yesterday I sent at least 10 e-mails with my iPhone, today I tried to transfer one and send one....they're still in my outbox !!!


I think it's Rogers SMTP that's causing this problem, of course if you're with ATT I would guess it's the same issue!

I will try to enable it later, I have no network where I am!

I am o2 pay and go and I was having exactly the same problem.

If you are 02 pay and go click the followin

Settings
Mail, Contacts, Calendars
Mail account in question, usually first option
Scroll down
Go into SMTP
Primary Server
Make sure server is on
Host name smtp. then your providers details
user name is your email address
password is your email password
SSL - off
Authentication - Password
Port - 587

I think my problem was that I was using port 25 and it didnt seem to want to work on that port. Got no problems sendin or replyin to emails now so im happy! Hope it works for you uys, let me know if it does!

Just to add more confusion to the thread. I use IMAP to connect to Exchange. I can send and receive fine except for certain domains. It appears that if the email address is in the format First.Last@domain.com or Name@us.domain.com they fail with the invalid email address. the extra "." seems to confuse the application.

Monaco30 hit the nail on the head. It's an issue with the sending of the user name to the Exchange server, at least for those using IMAP to connect to Exchange. The "." is the issue; for me my user name is being sent as "username.@domain.org"...note the "." after my username. There is a workaround on the Mac side (see comment by sunsworth) and Microsoft server side.

<http://www.macosxhints.com/article.php?story=20020829054506234>.

to sove this go to Outgoing Mail Server, then to SMTP that must be completed with your smt info, then go to Primary Server, with the same info, then to server that must be ON, then fill Host Name with same info an then complete the User Name with you user name as it is in your e-mail address but just up to the @ simbol. Do not include it. And the you Password. It shuold work this way.

Good luck