Postfix and mobile e-mail
Val has complained numerous times this last year that my e-mail reply addresses @none-of-yo.biz never work. Eventually I need to spend time configuring Postfix so that my e-mail actually works correctly, luckily a reasonable Postfix setup for home networks was thrown together.
Also useful was the Postfix SMTP Authentication Howto.
src/cyrus-sasl-2.1.17> ./configure --disable-krb4 src/postfix-2.0.18> make makefiles CCARGS="-DUSE_SASL_AUTH -I/usr/local/include/sasl" AUXLIBS="-L/usr/local/lib -lsasl2"7