Re: Spam Blocking by filtering on username / id

2019-09-25 Thread Joseph Tam via dovecot
On Wed, 25 Sep 2019, Plutocrat wrote: On 23/09/2019 4:13 PM, Bernd Petrovitsch via dovecot wrote: It's not directly a solution within dovecot but "fail2ban" exists. Yes, I have fail2ban, but that bans based on IP address. And most mail password attacks these days are distributed, and althoug

Re: Spam Blocking by filtering on username / id

2019-09-24 Thread Plutocrat via dovecot
Hi, Sorry for the delay in replying. Been having a few mail problems ironically! Gmail smtp server stopped working! On 23/09/2019 4:13 PM, Bernd Petrovitsch via dovecot wrote: > It's not directly a solution within dovecot but "fail2ban" exists. Yes, I have fail2ban, but that bans based on IP a

Re: Spam Blocking by filtering on username / id

2019-09-24 Thread Sami Ketola via dovecot
> On 23 Sep 2019, at 8.29, Plutocrat via dovecot wrote: > > This is probably quite an easy question, but I haven't been able to find the > answer. I'm running a server where all the email addresses are in the format > "u...@domain.com". I've noticed that a large number of fake login attempts

Re: Spam Blocking by filtering on username / id

2019-09-24 Thread @lbutlr via dovecot
On Sep 22, 2019, at 11:29 PM, Plutocrat wrote: > This is probably quite an easy question, but I haven't been able to find the > answer. I'm running a server where all the email addresses are in the format > "u...@domain.com". I've noticed that a large number of fake login attempts > use the for

Re: Spam Blocking by filtering on username / id

2019-09-23 Thread Bernd Petrovitsch via dovecot
On 23/09/2019 07:29, Plutocrat via dovecot wrote: > This is probably quite an easy question, but I haven't been able to > find the answer. I'm running a server where all the email addresses > are in the format "u...@domain.com". I've noticed that a large number > of fake login attempts use the form

Spam Blocking by filtering on username / id

2019-09-22 Thread Plutocrat via dovecot
This is probably quite an easy question, but I haven't been able to find the answer. I'm running a server where all the email addresses are in the format "u...@domain.com". I've noticed that a large number of fake login attempts use the format "user" eg. reception, service, root, admin. Is it