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On Nov 30, 2018, at 4:17 PM, Matthew Goebel mgoebel@emich.edu wrote:

We've recently had one or two sites block email coming from one of our lists. They seem to indicate it is because of sending address having bounces in it?

Email is probably the most stressed service on the Internet. It's also probably the most complex and widely misunderstood. There are tons of people out there writing solutions to address email abuse problems. Way too many of them have no idea what's in the email RFC's and how the system is supposed to work.

On 11/30/18 2:17 PM, Matthew Goebel wrote:

Hello,

We've recently had one or two sites block email coming from one of our lists. They seem to indicate it is because of sending address having bounces in it? ie... listname-bounces@list.emich.edu This seems odd, and I'm trying to figure out if anyone else has ever seen this? Not much I can do about this with mailman if true?

See https://wiki.list.org/x/4030690 for some suggestions about working with the offending sites.

If they are really rejecting the mail because of the literal '-bounces' in the envelope sender, you can change that. In Mailman 2.1 the 'list-admin' address is a deprecateGetBouncesEmaild (from Mailman 2.0) synonym for 'list-bounces and should be a working address. At around line 196 in Mailman/MailList.py, you can change

def GetBouncesEmail(self):
    return self.getListAddress('bounces')

to

def GetBouncesEmail(self):
    return self.getListAddress('admin')

To get Mailman to send from 'list-admin'.