The sender address was invalid

I got an iPod Touch since September 2007. No problem at all with the email account until the version 2 update software. I receive all my email on it but unable to send email, from gmail account, from my internet service provider email account etc... All email account I cannot send email.

Then I receive my new iPhone today, I was hoping not having the same problem. But I got the same problem, not able to send email. And I got this message: The sender address was invalid.

How can my address email can be invalid when it come from a reply or my address book.

Also the setting was not made by me, because my email account was sync from my powermac G5 and I can send email from my computer.

now I have two mobile device that can't send any email.

Any idea???

I upgrade to 2.0.1 the iPhone and can't send email again

Message was edited by: Gilles Savard1

Mac OS X (10.4.11)

Posted on Aug 12, 2008 6:42 PM

48 replies

ARobbins

Level 1

4 points

Jun 4, 2009 2:08 PM in response to RE1

I'm late getting into this thread. Sure wish I'd seen it last week when I almost drop kicked my new iPhone 3G into the next zip code.

Email worked fine for the first 2 weeks I had the phone. I could even email (mms) a photo to another cell phone (Verizon). Then all of a sudden the sender address is invalid message started. After calling Comcast, AT&T, and then Apple, here's what worked for me.

I have 5 email accounts. When I originally added them in setup, each one added a comcast.net to the SMTP server list(the same thing, 5 times). Primary was set to Comcast, and I also had the AT&T server. These were set to ON. The other 4 comcasts were set to OFF. I deleted all the other eamil accounts and left only my primary comcast account. Then I deleted all the extra comcasts in the SMTP list, leaving only the primary and the AT&T server. Everything started to work. So I added my other email accounts back in, and each time another comcast.net got added to the SMTP list. So far everything's been working (about a week now). But if it stops again, I'll just delete the extra comcast.net listings from the SMTP server list again.

Hope this helps someone else before they frisbee their iPhone.

Talsbury

Level 1

0 points

Jun 24, 2009 10:01 PM in response to RE1

Updating the SMTP user name and password solved everything using a comcast mailserver. Thank you, I thought this would takes weeks. This problem started After updating to iPhone 3.0 even my apple store did not have an answer for me. No changes to server ports or ssl settings required.

Message was edited by: Talsbury

Aug 28, 2009 6:46 AM in response to RE1

RE1,
I found your thread and want to thank you for fixing a vexing problem! You rock!

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The sender address was invalid