As many of you know, Japanese cell phones come with an email address, so that the Japanese use mobile instead of emails sent SMS as in the case of Spain.
Most Japanese use mobile to surf the internet a lot, so many pages are recorded using the mobile etc. This leads them to often fill their mobile e-mail spam. To combat this, the Japanese tend to do two things, or change the email address or create an email really difficult for computer systems that send email conpongan an email randomly not so strange.

For some time, sometimes sent to the email address of the mobile of my Japanese friends from the PC. At first probe with Hotmail, but hotmail would not let me send email to some addresses with a colon in between the direction or before the at sign (example: name or name apellido@softbank.ne.jp .. .. @ docomo.ne . jp), so we opt to use Gmail that allowed me to send emails to any address.

Unfortunately, for many who live in Japan, Gmail has changed its policy target validation email, updating it with the latest specifications of RFC and therefore, as the RFC states these addresses are resolved as discussed above is not valid, and when I try to send a message from Gmail to my friends in the direction of this guy says: "Unrecognized email address .. XXX@sofbank.ne.jp XXX. Fix it and try again. " This has started to pass me for a couple of days, so Gmail's policy has been changed recently.
Fortunately, reading the RFC, I discovered that if I put the email address before the @ in quotes (eg "name .. last name" @ softbank.ne.jp) if that I can send emails correctly.

I hope this trick will be useful quotes many of you.

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