3 ms·

> Even sending to gmail addresses is sometimes prohibited. How do you know it's not a Google hosted email address if they use a custom domain (with a Google Ap

by gkya 10y ago

> Even sending to gmail addresses is sometimes prohibited. How do you know it's not a Google hosted email address if they use a custom domain (with a Google Apps plan one can use a custom domain on top of Gmail)?

smrq 10y ago
Nobody's saying that arbitrary corporate restrictions are well thought out.
captn3m0 10y ago
You can sniff MX records fairly easily to figure it out: https://github.com/jace/mxsniff https://github.com/jace/mxsniff