I get bounce back message "Grammar error reported for RCPT command: Error Command Code 501 was encountered waiting for a RCPT response (501 #5.5.2 syntax error 'RCPT TO:"
In the log there is this command: RCPT TO: <firstname.lastname@example.org>
From what I've read really quick there shouldn't be a space, it should look like this:
Does this mean that my mail server is adding the space and the receiving server is rejecting it then? Is there any way I can fix this? We are using ISMail EP