I am sending an email to a large group containing around 800 accounts. There are a few accounts that have longer account names (more than 20 characters). These emails are truncated at 20 characters and will not send. It is my understanding that email addresses can be longer that 20 character, so I'm uncertain why it truncated. I have seen that the samaccountname is limited to 20 -- but in the case with these account, the mail address is correct. An example would be firstname.lastname@example.org -- it truncates at email@example.com (20 characters)? Others accounts with problem are very similar.
Thanks for in advance.