I need to add a logo in the mail NewReviewMailToReviewers, is that possible ?
Is it also possible to add an attachement on the mail sent to the reviewers ?
To answer your question, yes, it's possible to add a logo the email template.
Add an img tag
<img src="/aveksa/images/logo-main.png" />
Tested on 6.9.1 P07
I find the Email Event templates limited and would strongly recommend the use of 'Escalation' functionality.
Within the associated escalation workflow the Email node will offer a lot more flexibility (including HTML markup) and has a much nicer look and feel to the end user, although I'm not sure it will allow attachments.
I would recommend 'Escalatioin' workflows too, whenever possible, for better overall granular control of the emails.
To answer your specific question, it is not possible to add attachments to emails generated by email events.
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