They say you could do this and the max is 3, they do not they you have to wait 
until the third one. That’s a big difference!

Kind regards,

/ Tobias Herkula
Manager Detection Anti Spam
Cyren (Berlin)

________________________________
Von: mailop <mailop-boun...@mailop.org> im Auftrag von Marco Franceschetti via 
mailop <mailop@mailop.org>
Gesendet: Mittwoch, Februar 27, 2019 6:26 PM
An: mailop@mailop.org
Betreff: [mailop] deactivation of hard bounces

Hello,

We at contactlab are considering a change in the deactivation of hard bounces.
Currently, we suppress not existing mailboxes at the first hit.

We are aware of a small percentage of false positives.

Recent admissions criteria for Certified Senders states:
"The CSA sender must take email addresses from mailing lists, if, after sending 
to this address,
the mailbox is identified as non-existent; at the latest, however, this must 
occur after three hard
bounces".

We are evaluating to remove not existing mailboxes from the lists of our 
clients after the second hit instead of the first one.

Do you have any considerations, suggestions about this?

Marco


Marco Franceschetti
Head of Deliverability | ContactLab
marco.francesche...@contactlab.com
Via Natale Battaglia, 12 | Milano
contactlab.com/it

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