My company sends out invitation emails to courses and the distribution lists are created by the client that they are sent out to.
However, the client compiles the list of recipients a little too early in advance and some of the recipients leave the company, change their names and sometimes they just plain input the addresses wrongly.
Anyway, I keep getting RSP: 550 too many invalid recipients
You would say, that's what's meant to happen, ok, is this my server saying this or is it a response from the recipient's server telling me to stop sending them junk?
I need to know because the client is blaming us for the problem.
The client does not have the capacity to clean up their distribution lists, is there a way for us or them to just bypass the errors and continue sending/receiving the mail anyway?
Also, is it true that if there are so many invalid recipients that it will stop receiving mail from the sender all together temporarily?