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Revision 2
Ross Jacobs's avatar
71
Ross Jacobs
updated 2019-04-15 11:51:29 +0000

Take a capture with Wireshark and then filter with tcp.port == 25. That should show you any SMTP traffic.

Edit: @grahamb is correct here. I should have specified that you would need to take this capture on the upstream device, whichever that is. Without some networking/IT background, this will be difficult for you to accomplish

If you are not versed in networking / IT, you may want to talk to a friend or hire a consultant, as getting your internet access back will likely require hands-on expertise.

Revision 1
Ross Jacobs's avatar
71
Ross Jacobs
answered 2019-04-15 11:39:12 +0000

Take a capture with Wireshark and then filter with tcp.port == 25. That should show you any SMTP traffic.

Edit: @grahamb is correct here. I should have specified that you would need to take this capture on the upstream device, whichever that is. Without some networking/IT background, this will be difficult for you to accomplish

If you are not versed in networking / IT, you may want to talk to a friend or hire a consultant, as getting your internet access back will likely require hands-on expertise.