16 May
                
                    2014
                
            
            
                16 May
                
                '14
                
            
            
            
        
    
                11:18 p.m.
            
        Am 16.05.2014 21:03, schrieb Oscar del Rio:
On 05/13/14 03:02 PM, Stephan Bosch wrote:
Use of NULL envelope sender is generally recommended to prevent mail loops
Unfortunately, many servers out there reject emails with NULL sender. Some recent examples (real server names edited)
*that* are not compliant mailservers - period
they also break sender verification and what not else