[Mailman-Users] Spam / Email Spoofing Problem (SPF check possible?)

2019-04-06 Thread Stephen J. Turnbull
Valentin Schwarze via Mailman-Users writes: > I am the administrator of some mailman lists of the student > self-administration of our university. We happend to have some spam > issues on our mailman lists. These spammers were able to send > emails on our lists through mail spoofing (only

Re: [Mailman-Users] Spam / Email Spoofing Problem (SPF check possible?)

2019-04-06 Thread Stephen J. Turnbull
Grant Taylor via Mailman-Users writes: > Note: SPF by itself won't do anything to protect against From: header > spoofing. Sure, but if configured correctly, it gives you exactly the information you need. The problem with SPF is that a lot of header spoofing is legitimate (at least from the

Re: [Mailman-Users] Spam / Email Spoofing Problem (SPF check possible?)

2019-04-05 Thread Grant Taylor via Mailman-Users
On 4/5/19 11:59 AM, Valentin Schwarze via Mailman-Users wrote: Are there any settings that we as administrators of the list could change to end that behavior? For example, is it possible in any way, that Mailman only accepts emails that passed a SPF check? Or any other option to prevent email

Re: [Mailman-Users] Spam / Email Spoofing Problem (SPF check possible?)

2019-04-05 Thread Carl Zwanzig
On 4/5/2019 10:59 AM, Valentin Schwarze via Mailman-Users wrote: We happend to have some spam issues on our mailman lists. These spammers were able to send emails on our lists through mail spoofing (only faking the From: field in the header is sufficient to get accepted). Do you have any

Re: [Mailman-Users] Spam / Email Spoofing Problem (SPF check possible?)

2019-04-05 Thread Mark Sapiro
On 4/5/19 10:59 AM, Valentin Schwarze via Mailman-Users wrote: > > I am the administrator of some mailman lists of the student > self-administration of our university. We happend to have some spam issues on > our mailman lists. These spammers were able to send emails on our lists > through

[Mailman-Users] Spam / Email Spoofing Problem (SPF check possible?)

2019-04-05 Thread Valentin Schwarze via Mailman-Users
Hello, I am the administrator of some mailman lists of the student self-administration of our university. We happend to have some spam issues on our mailman lists. These spammers were able to send emails on our lists through mail spoofing (only faking the From: field in the header is