08-01-2019 11:43 PM
HI. I test bounce verification in esa. I googled how to do that and found this commands to test bounce verification functionality.
telnet esa.example.com 25
Trying 192.168.1.254...
Connected to mail.texno.com
Escape character is '^]'.
220 mail.texno.com ESMTP
helo
250 mail.texno.com
mail from:
250 sender <> ok
rcpt to: frnak@texno.com
550 #5.1.0 Rejected by bounce verification. (It is ok. I thought that my configuration works )
mail from: MAILER-DAEMON@test.com
250 sender <MAILER-DAEMON@test.com> ok
rcpt to: frnak@texno.com
250 recipient <frnak@texno.az> ok (Shouldn't it show "Rejected by bounce verification")
https://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/118466-qa-esa-00.html
Solved! Go to Solution.
08-04-2019 07:37 PM
Hey Ccns90
Thank you for bringing this article to my attention.
I believe the article is inaccurate and we should not treat the email with MAILER-DAEMON@domain.com as a bounce event but as a standard envelope sender hence why it is allowed.
The ESA will treat envelope sender with a null value <> as a bounce email and without a proper address tagging it will be dropped due to bounce verification.
I will have this article updated.
Regards,
Mathew
08-04-2019 10:35 PM
08-04-2019 10:57 PM
08-04-2019 07:37 PM
Hey Ccns90
Thank you for bringing this article to my attention.
I believe the article is inaccurate and we should not treat the email with MAILER-DAEMON@domain.com as a bounce event but as a standard envelope sender hence why it is allowed.
The ESA will treat envelope sender with a null value <> as a bounce email and without a proper address tagging it will be dropped due to bounce verification.
I will have this article updated.
Regards,
Mathew
08-04-2019 08:35 PM
Hi Mathew
So i properly configured bounce verification right?
08-04-2019 08:42 PM
08-04-2019 08:46 PM
Thank you in order to warn me. I gave configured on destination control not on mail policies. Could you please tell me which mail policy i should apply to? I have 5 mail policies
08-04-2019 08:56 PM
08-04-2019 09:21 PM
Do you think it would be enough to apply only to Unknown mail flow policy?
I am goung to configure spf as well and not sure which mail flow policy it should be applied.
08-04-2019 09:38 PM
By the way i looked at configuration in mail policies flow there is no bounce verification line to enable. Only Consider Unragged Bounces to be valid shown with Use defaultNo Yes No choices. I choosed use default no
08-04-2019 09:44 PM
08-04-2019 09:41 PM - edited 08-04-2019 09:42 PM
Hi Ccns90,
I have checked on the same and could see that I am having similar results.
As informed by Mathew, it seems that the article needs to be corrected and we will work towards the same to get it updated.
Thank you for bringing this up to our notice.
Highly appreciated.
Regards,
Pratham
08-04-2019 09:55 PM
Thanks for your help i really appreciate. Could you please tell me the difference between Use default no and No? In a bounce verification field i choosed Use Default No
08-04-2019 10:35 PM
08-04-2019 10:57 PM
08-04-2019 11:29 PM
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