Unable To Change Any Single Letter Of Code In Web.config And In Pages?

May 13, 2010

14 days ago all emails were being delivered without any error, but now none of the email is delivered neither from local site nor from hosted site.I did not change any single letter of code in web.config and in pages.

Web config file is as follows.
<appSettings>
<add key="MailFromAddress" value="<user name>@gmail.com"/>
<add key="MailToAddress" value="<user name>@gmail.com"/>[code]....

and under system net

<system.net>
<mailSettings>
<smtp from="Jack <<user name>@gmail.com>" deliveryMethod="Network">[code]....

And the page that sends message is as follows

myMessage.From = New MailAddress(AppConfiguration.MailFromAddress, AppConfiguration.SenderName)
myMessage.To.Add(New MailAddress(AppConfiguration.MailToAddress, AppConfiguration.ReceiverName))

Dim mySmtpClient As New SmtpClient()
Try
mySmtpClient.EnableSsl = True[code]....

On debugging it always fires the catch block. Earlier I never had such problem with emails but for last few days none of the email is being delivered.Is it my system problem? Is it any port no. issue? My local site and remote site are not delivering any message. what could be the reason and how I make it functioning as before.

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