Ok this is off topic but something that has been plaquing my server network.
So I am betting on someone here having this experience - and possibly a solution.
Dialup users on my servers cannot send email using their mail.theirdomain.com. (they can recieve)
If they change to broadband it works fine.
My first thought was the ISP’s are blocking port 25 - so I contacted them personally and they are not blocking port 25. ALL of my dialup users cannot send mail - all different isp’s etc.
I have tested with local isp and sure enough i could not send email after downloading.
Only about 5% of my customer base - but still cant ignore any customers I prefer to take care of them all.
Anyone have any idea what I need to look for or what to check to see what might be the problem?
I’ve increased the timeout time of SMTP - thinking that due to dialup, its a slower connect process.