I have been using ispconfig for over 13 years I had Ispconfig 3.0??? installed i installed 3.2??? on a new server now port 25 mail does not work on my iphone why everything is working except email on port 25 why?
Today, you use port 587 from the mail client to the mail server. Port 25 is used for connections between servers. Edit the mail account settings on your iPhone and change the port number 587.
You must have confused your server port 25 and your device port 25. I was talking about the latter. As @till pointed out use port 587 on your device instead.