Mail SystemSelect the mail system to be used (SMTP, Microsoft Outlook or Windows Messaging).
Content typeSelect format of mail message (text/plain or text/html).
Character setSelect the character set used in mail messages.
Regular Expression for Email Address Validity CheckIn this field it is possible to define a customer-specific regular expression for validation of email addresses in views and in workflow activity 'Send Mail'. The setting is stored in mainparameter (PARAM="MailSystem.EmailAddress.ValidationRegex", PATH="MailSystem"). When not defined, a default expression is used. Since version 5.0 this standard expression supports internationalized domain names, in older Valuemation versions a custom expression needs to be supplied if IDN support is requested.
The standard regular expression which supports IDN is:
^[\p{L}0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[\p{L}0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[\p{L}0-9](?:[\p{L}0-9-]*[\p{L}0-9])?\.)+[\p{L}0-9](?:[\p{L}0-9-]*[\p{L}0-9])?$
Please see also the 'Validate Mail Address' option in the View Customizer.