The email address “xxx” is not recognized.
It seems that mail service provider like hotmail and gmail has added their new features. The system will filter the e-mail address wether it is correct by the Email Address Internationalization.
The local-part of the e-mail address may use any of these ASCII characters:
- Uppercase and lowercase English letters (a-z, A-Z)
- Digits
0through9 - Characters
! # $ % * / ? | ^ { } ` ~ & ' + - = _ - Character
.provided that it is not the first nor last character, nor may it appear two or more times consecutively.
So what happen is that sending to some e-mail address which is not valid by the standard is no longer possilbe. Especially in Japan, their e-mail is not capable with the RFC specification. (more…)
