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Hello 3CX Team,
As discussed in length here: https://www.3cx.com/community/threads/3cx-smtp-blacklisting.121318/, there are several reasons that lead to this request.
When an e-mail message has a soft bounce, instead of blacklisting the destination for 7 days, 3CX should wait 4 hours (try again), another 8 hours (try again), and a final 12 hours (try again). Waiting for a total of 24 hours (with 3 retries) will solve a lot of transient delivery issues users are experiencing.
As discussed in length here: https://www.3cx.com/community/threads/3cx-smtp-blacklisting.121318/, there are several reasons that lead to this request.
When an e-mail message has a soft bounce, instead of blacklisting the destination for 7 days, 3CX should wait 4 hours (try again), another 8 hours (try again), and a final 12 hours (try again). Waiting for a total of 24 hours (with 3 retries) will solve a lot of transient delivery issues users are experiencing.
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