You would have to upgrade the System to at least 7.0, but probably 7.1.
System 7.5 would make it easier yet, but would require a memory upgrade quite likely.
Both of these systems are available free for download from Apple.
You need to be able to run MacTCP which isn't always easy to get these days. FreePPP (www.rockstar.com) will probably work for the dialer portion. Any standard modem will work, but a 56k modem will probably be overkill as the older serial ports cannot support the full bandwidth of one.
An old version of Eudora would do well for e-mail. I have personally run Netscape 2.02 on an SE/30 which was running 7.5.1.
After all of that hassle, you will still only have a tiny window into the Internet with browsing being very squeezed.
Refurbished and used iMacs or other older Macs might be a better fit if any browsing is going to be done. If it is just e-mail, then it might be worth it...
drewman
[This message has been edited by drewman (edited 11-12-2000).]
[This message has been edited by drewman (edited 11-12-2000).]