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NCM SMTP Server

hpstech

We migrated to a new SMTP relay (IIS) and it works fine for SAM/NPM.

NCM its not working and I've tried everything.

Why is there not a test SMTP widget for NCM like there is for NPM?

How can I troubleshoot SMTP NCM email failures?

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hpstech

Any ideas on these? Why is NPM SMTP working fine and not NCM?

2021-07-22 06:19:10,652 [29] ERROR SolarWinds.Cirrus.BusinessLayer.Jobs.Notifications.BaseJobNotification - Unable to send plain text: System.Net.Mail.SmtpException: Failure sending mail. ---> System.IO.IOException: Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
2021-07-22 06:19:08,480 [29] WARN  SolarWinds.NCM.Common.Help.TlsScope - There was a web exception. Current security protocols: 'Tls, Tls11, Tls12'. Fallback to the latest version of TLS.System.Net.Mail.SmtpException: Failure sending mail. ---> System.IO.IOException: Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host

GoldTipu

Sorry for the delayed response. you may have already resolved your issue . Do you still have the same issue ?

- Have you tried sending email without SSL option under SMTP for NCM ?

- Have you tried using SMPT port 25

-Have you disabled any AV / Firewall protection running on the NCM System ?

ERROR SolarWinds.Cirrus.BusinessLayer.Jobs.Notifications.BaseJobNotification - Unable to send plain text: System.Net.Mail.SmtpException: Failure sending mail. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
--- End of inner exception stack trace ---
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.DelegatedStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.Net.BufferedReadStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.Net.Mail.SmtpReplyReaderFactory.ReadLines(SmtpReplyReader caller, Boolean oneLine)
at System.Net.Mail.SmtpReplyReaderFactory.ReadLine(SmtpReplyReader caller)
at System.Net.Mail.SmtpConnection.GetConnection(ServicePoint servicePoint)

hpstech

This is resolved. IIS needed a larger attachment setting.