Apple iOS 10: How To Fix “Server Does Not Allow Relaying" Email Error

For those who keep getting the “Server does not allow relaying” email error on your iPhone, iPad and iPod touch running iOS 10, there several ways to fix this issue. Many iOS 10 users have reported a similar issue like this, generally after they have updated either a iPhone or iPad to the latest iOS software by Apple. It’s normal on iOS 10, iOS 9 and iOS 8 for Apple devices like the iPhone 6s, iPhone 6s Plus, iPhone 6, iPhone 6 Plus, iPhone 5s, iPhone 5c, iPhone 5 and iPhone 4s and any iPad running iOS 8 and above. When you see the “Server does not allow relaying” error, it means that the email can’t be sent and the following message will start showing up on their iPhone and iPad: “A copy has been placed in your outbox. The recipient “email@address” was rejected by the server because it does not allow relaying.”
 
The following are different methods that will help solve and fix the email error “Server does not allow relaying” on both iPhone and iPad
 
 AOL Email Users
If this problem might happened because of AOL.com mail issue use the following steps.
Go to Settings > Mail, Contacts, Calendars -> select your AOL.com account -> SMTP from the Account Info Page -> SMTP from the SMPT Page. Ensure the server is ON and the Host name is smtp.aol.com.Furthermore ensure your AOL account username and password are correct and added in the outgoing mail server. Also ensure authentication is set to password and server port is 587.
 
 AOL Email Users Option 2

1. Turn off the AOL “primary server”
2. Then add an other SMTP server using “smtp.aol.com”, your aol username and password.
3. Set up automatically as “On” under the “Other SMTP servers”.

It’s important to note that you should make sure you turned off the primary server off and other SMTP server switched ON.
 
Other Email Users
All other email users besides AOL should follow these steps:
Go to Settings -> Mail, Contacts, Calendars -> Accounts ->Account Info > SMPT
Turn off primary server and turn on other SMTP server like AT&T.
 
Method 4
Delete your email account and add it again.
 
Method 5
Go to  Settings -> Mail, Contacts, Calendars -> Your  Account -> Outgoing mail Server SMTP -> Primary Server. Turn the primary server on and fill with username and password under Outgoing Mail Server.