c# - How to Show the SMTP Status -

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i wrote program 1 year ago . designed form "connect " . , winform email textbox , ...etc.

i use smtp send email email understand want me know.

many of customers me , "i sended email product " don't receive ! after , understand anti viruses blocking smtp , install anti virus , block smtp , send email on debug mode nothing happened (the program doesnt give me error) .

so ,

  1. is there programmatically way understand , smtp blocked or not ?!

  2. i use ftp send suggest of customers know , not secure way me , customers . cause many person use our iis server administrator(and im not admin of server) . can u suggest me send customer suggest in secure way ?!

thank u read .

most of anti-virus products catch , prevent smtp service sending it, not making requests, don't think going have luck programatically determining if intercepted.

the easiest option (but not fool proof) shell out windows

mailto:email@emailaddress.com

i switch web service pass information server , server sends emails.


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