Hello Jeffrey, thank you, I'll try to implement it here. Wonder if someone has done it before or if there is any plugin for this? Or (the best way) if some developer encodes it to some future release of RT? :) Petr
On 5.1.2017 21:51, Jeffrey Pilant wrote: > Check out > http://www.regular-expressions.info/email.html > It indicates the 'most' official regex is: > \A(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)* > | "(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f] > | \\[\x01-\x09\x0b\x0c\x0e-\x7f])*") > @ (?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])? > | \[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3} > (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]: > (?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f] > | \\[\x01-\x09\x0b\x0c\x0e-\x7f])+) > \])\z > > Yeah. Quite a mouthful. This is because there are quite a few ways to > express email addresses. And even this is not foolproof. > > The same page also has other simpler regex expressions that work a fair > amount of the time, but are less complicated, like: > \b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b > > The page claims it is 99% effective. > > That, however, does not solve your problem. Just because it is formulated > correctly does not mean it is a valid address. > > The usual solution is to whitelist the addresses and do a lookup. Any > address not found gets added tentatively, but flagged for testing. You can > also at this time prompt for acceptance vs. going back to an edit screen. > This does require you maintain a list of valid email addresses somewhere. > The user list is a likely place, but if you are sending emails to people who > are not users, then that fails. > > /jeff > ________________________________________________________________________ > The information contained in this e-mail is for the exclusive use of the > intended recipient(s) and may be confidential, proprietary, and/or > legally privileged. Inadvertent disclosure of this message does not > constitute a waiver of any privilege. If you receive this message in > error, please do not directly or indirectly use, print, copy, forward, > or disclose any part of this message. Please also delete this e-mail > and all copies and notify the sender. Thank you. > ________________________________________________________________________ > -- +-------------------------------------------------------------------+ Petr Hanousek e-mail: petr.hanou...@cesnet.cz MetaCentrum User Support phone: +420 950 072 112 CESNET z.s.p.o. mobile: +420 606 665 139 location: Zikova 13a, Praha room: 32b Czech Republic +-------------------------------------------------------------------+