Problem sending email using SSL

0.00/5 (No votes)

See more:

Hi I am getting a time out when I try to send email with VB.net using ssl.
It works fine if I disable SSl and use port 25. I have tried enabling SSL and using both port 465 and 587 and every time it times out when I try to send. We use this mail server to send out email with ssl on port 465 daily without any problem.

Any assistance would be greatly apricated

see smtp settings here:

'Setup SMTP Server
Dim Smtp = New SmtpClient

Smtp.Host = Company.SMTPServerName
Smtp.Port = Company.SMTPPort '465
Smtp.DeliveryMethod = SmtpDeliveryMethod.Network
Smtp.Credentials = New Net.NetworkCredential(Company.FromEmailAccount, Company.FromEmailPassword)
Smtp.EnableSsl = Company.EnableSsl ' true

What I have tried:

I have tried using both port 465 and 587 and every time it times out when I try to send.

Posted 6-Nov-19 2:44am

KentJ05

Add a Solution

Comments

Richard MacCutchan 6-Nov-19 10:11am

Speak to the administrators of your SMTP host to check what you need to configure.

KentJ05 6-Nov-19 10:37am

Thanks, we did but everything is in order
remember we use that same mail server to send out ssl emails on port 465 many times a day with outlook 2016

Richard MacCutchan 6-Nov-19 11:06am

Well something is obviously not correct, but it is impossible for us to guess what. If you are not getting an error message or exception then you need to check the server logs to see if there is any message about connection failures.

ZurdoDev 8-Nov-19 11:42am

What he said. ^

Richard Deeming 8-Nov-19 13:15pm

You could try configuring a network trace log for your application, to see if that gives you any clues:
How to: Configure Network Tracing | Microsoft Docs[^]

Or use a tool like Wireshark to monitor the network traffic from your application.

Doug- VisualBasic VB.NET 27-Jan-20 0:19am

I would suggest checking any routers, or the mail server to make sure the IP address from this computers is not being blocked on these ports. I know our network security has done this at times.

BigMax 4-Dec-22 8:48am

I am in the same situation, three years later ... any news ?

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Last 24hrs

This month

Pete O'Hanlon	210
Graeme_Grant	120
Ravi Bhavnani	90
Andre Oosthuizen	85
Dave Kreskowiak	60

Pete O'Hanlon	1,695
OriginalGriff	1,250
Graeme_Grant	810
Richard Deeming	743
Dave Kreskowiak	559

Problem sending email using SSL

Add your solution here

Preview 0

Problem sending email using SSL

Add your solution here

Preview 0

Existing Members

...or Join us