mail says sender address is invalid

Anybody else experiencing problems in iPad os 13.1 using email....sending mail to my family using addresses that I have used for years just gets me a message that the email address is invalid....very frustrating.

iPad Pro 9.7-inch WiFi, Cellular

Posted on Sep 27, 2019 7:34 AM

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Posted on Dec 27, 2019 1:37 PM

I was getting the sender email invalid as well after updating to the 11. I deleted my mail account and re-added it. On the outgoing server, where it says user name and password optional, it isn't. Once I added it my mail would go through. My husband had the same problem, but he had the user name and password filled in. I told him to re-enter his password. The phone reverified, now he can send email.


Hope this works for others!!!

50 replies

Oct 24, 2019 10:45 PM in response to Wyomike

This worked for me:


Settings > Passwords and Accounts > Click on your email > Click on your email again at the top > Outgoing Mail Server > Click Primary Server which is at the top.

Now make sure the info on this screen is filled out. Username/password/use SSL/Authentication should be password/check that the Port # is correct. (You may need to check with your ISP for the number.)

Feb 7, 2020 3:10 AM in response to milena145

The email program has just disintegrated into a complete mess......after composing an email and hitting send it goes straight to the trash.....I will be composing an email and all of a sudden everything is reversed.....all the letters and words are backwards and the cursor is at the front of the email.....it is just a big joke to Apple I guess as they don’t seem to want to address the problems.

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mail says sender address is invalid

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