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Have you enabled the secure password authentication ???disable it in iphone.
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Have you enabled the secure password authentication ???disable it in iphone.

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One of my users just bought a Verizon Wireless iPhone 4. &nbsp;We are not using active sync. &nbsp;IMAP is allowed. &nbsp;The iphone is able to receive mail just fine but it is unable to send mail. &nbsp;On the iphone the inbound and outbound mail settings are the same.
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One of my users just bought a Verizon Wireless iPhone 4.  We are not using active sync.  IMAP is allowed.  The iphone is able to receive mail just fine but it is unable to send mail.  On the iphone the inbound and outbound mail settings are the same.

Verizon iPhone 4 &amp; Microsoft Exchange 2003

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

The iPhone is a smartphone made by Apple Inc. It and the iPad, along with several other mobile devices from Apple, run on the iOS operating system, which has its own topic, as does the iPad for device-specific questions. Native iOS applications are written in Objective-C or in Swift using the Cocoa Touch frameworks or HTML5 compiled with the help of a package manager such as Adobe PhoneGap; a common IDE is Xcode.

Verizon iPhone 4 &amp; Microsoft Exchange 2003

Verizon iPhone 4 & Microsoft Exchange 2003