Is it even possible to be be infected with a bot/spamming software on Ubuntu (or any other distro)?
My ISP blocked my port 25 (and 465) for outgoing connections (outbound connections, from home to remote server) to SMTP, so I can't use my business emails from home right now. Their reasoning for blocking me is: "because of you sending spam" which I'm not and they told me that if I'm not sending then my OS is probably infected...
I could use a comprehensive list of tools and guides to check the system (Ubuntu
13.10 14.04 64bit) for any infiltrates/malware/rootkits.
I also have Windows 8.1 (64bit) installed just because I also like to game on my home computer... but that's what I only do on Windows...when I have time...
Wireless is off and even if it's on it's pass protected.
Scanning of windows didn't reveal anything nor should have since
there's windows and games installed there.
I can connect to other ports for SMTP but our server uses 25 and that cannot change
I also tested connecting to port 25 from windoze (using thunderbird)
I use thunderbird for email client on ubuntu and tested a few others just to verify that it was not a misconfig of thunderbird.
Telneting also outputs connection timeout...
My ISP still refuses to unblock me...
Maybe I'll have to open up 587 on the server, since that isn't blocked at the moment (I can still use Gmail)
I guess today I was connected with another tech from my ISP's support and told me that there isn't a block from them... I was furious!!! I don't know what was the previous tech doing... maybe he is new and was reading from a script..
So I tested another ISP via tethering from my phone and I successfully managed to send emails through port 25. Essentially I didn't change anything, only the ISP. Are they kidding me? Maybe the tech-support doesn't know how to interpret what they looking on their screens for my account or could it be something else?
Another step I took was to fully reset my router to it's default settings and get another dynamic IP. Still no connection to port 25.
I'm planning to get a used router from some friend or something to test with another router just to be sure the problem lies with my ISP.
EDIT 3: It's been awhile since my last update to this question. I moved back to my old house (which is in a different part of the country) where I have the same internet provider. The same company!! My settings just work as expected. I can send emails just fine using port 25. I bet the problem was with that nasty ZTE router that the ISP hands out to new customers.