Sending Email Not Working For Some Mail Id's!, This Comment

Question

http://www.codeproject.com/Tips/640802/Create-SendEmail-Workflow-Custom-Activity

I am Sending Email By Using Above Link Code In Windows WorkFlow Console Application.

The Details Are Like This!!

 

Case=>1

 

body:"I would like to request approval to join Your Group"

DisplayName:RequestingEmail

From:"[email protected]"

Host:"smtp.gmail.com"

Password:"********"

result:

Subject:"Approval Request"

To:"[email protected]"

Username:"ummidikondababu83"

 

Sending Mail With Above Details Is Working

 

Case=>2

 

body:"I would like to request approval to join Your Group"

DisplayName:RequestingEmail

From:"[email protected]"

Host:"smtp.gmail.com";

Password:"********"

result:

Subject:"Approval Request"

To:":"[email protected]"

Username:"kondababuummidi"

 

Sending Emal With Above Details Is Not Working

 

 

And Also For Some Email Address Also Its Not Working Why.... And Also Its Not Showing Me Any Error ..The Excecution Just Stopped After Send(EmailMessage) Function Excecutes

 

 

Please Give Me Solution and Say What I Did Wrong In This Sending Email