Hi, have you resolved your problem?
i've the same...
i've use a dedicated transport with a different IP (nine times :( ) but
after few email the message return in log.
2025-03-26 16:08:49 ftpa relay9/smtp[65038]: 8B5A9ACB2CA:
to=<em...@libero.it>, relay=smtp-in.libero.it[213.209.1.129]:25,
delay=15752, delays=14750/1001/0.11/1, dsn=4.0.0, status=deferred (host
smtp-in.libero.it[213.209.1.129] said: 451 too m
any messages, slow down. [smtp-13.iol.local; LIB_650] (in reply to end of
DATA command))
in main.cf:
relay9_destination_concurrency_limit=2
relay9_destination_rate_delay=20s
relay9_destination_concurrency_failed_cohort_limit=10
in master.cf:
relay9 unix - - n - 1 smtp
-o smtp_bind_address=91.102.48.154
-o smtp_helo_name=ftpa.it
-o syslog_name=relay9
-o inet_interfaces=91.102.48.154
-o myhostname=ftpa.it
-o relay9_destination_concurrency_limit=2
-o relay9_destination_rate_delay=20s
-o relay9_destination_concurrency_failed_cohort_limit=10
twenty seconds of delay.
At this moment the queue is over 1000 email
the assigned IP has the correct spf and reverse dns
Il 04/04/24 15:21, Claudio Faoro via mailop ha scritto:
Hi Stefano,
thanks for the informations, now I tried to set a specific transport on
Postfix for IOL domains (blu.it, inwind.it, iol.it, libero.it and
virgilio.it).
For that transport, I configured "destination_concurrency_limit = 1" and I
removed the delay. Do you think it might be ok?
Yahoo seems to be working at the moment. To be careful, I'll try to
configure the retry time as you suggested.
Thanks,
Claudio
----------------------------------------------------------------------------
*Da: *"Stefano Bagnara" <mai...@bago.org>
*A: *mailop@mailop.org
*Cc: *"Claudio Faoro" <c.fa...@bbbell.it>
*Inviato: *Giovedì, 4 aprile 2024 10:38:59
*Oggetto: *Re: [mailop] Delivery issues with libero.it / virgilio.it (IOL)
Hi Claudio,
About Libero (IOL) try to use a single connection. I got that error by
using 2 concurrent connections from the same IP: you can send very
fast but you can only use a single connection. I've never been able to
get in touch with a Libero postmaster recently.
About Yahoo from what I saw they have an hourly rate limiting that is
being reset at the 30 minute of each hour and a daily limit that
resets at 3 in the night (CET): the 2 limits depend on your IP
reputation, so you can try delaying 1 hour for the first retries and 1
day for the next ones, until yahoo learn your IP reputation. Yahoo
postmaster is here in the list.
Stefano
On Thu, 4 Apr 2024 at 01:07, Claudio Faoro via mailop <mailop@mailop.org>
wrote:
>
> Hi everyone,
>
> a couple of weeks ago I configured a new Postfix server, it's used
exclusively by a newsletter service with 20000 subscribers.
> The newsletter service has been active for more than 10 years on a very
old server running qmail.
> Unfortunately, I had to decommission the old qmail server in a few days,
replacing it with the new one. It was not possible to keep the same IP
address.
> I've correctly configured the SPF, DKIM, DMARC and PTR records
(mail-tester.com gives me 10/10).
> The first few days, I had problems delivering mail to several providers
due to the amount of messages. I guess it's partly due to the new IP.
> For example:
>
> Mar 30 15:37:00 mx1 postfix/smtp[2021]: 6940F7FF09: to=<REDACTED>,
relay=mx-eu.mail.am0.yahoodns.net[188.125.72.74]:25, delay=3473,
delays=0.47/3472/0.71/0.04, dsn=4.7.0, status=deferred (host
mx-eu.mail.am0.yahoodns.net[188.125.72.74] said: 421 4.7.0 [TSS04]
Messages from REDACTED temporarily deferred due to unexpected volume or
user complaints - 4.16.55.1; see
https://postmaster.yahooinc.com/error-codes (in reply to MAIL FROM command))
>
> After a few mailings, the situation seems to have stabilized, Yahoo no
longer gave me problems.
> Unfortunately, a good percentage of our subscribers use an email address
from Italiaonline/IOL (libero.it, virgilio.it, iol.it, inwind.it, etc...).
> Most of the emails to IOL get bounced:
>
> Mar 30 00:15:40 mx1 postfix/smtp[51700]: 509762617D: to=<REDACTED>,
relay=smtp-in.libero.it[213.209.1.129]:25, delay=116950,
delays=116848/101/0.09/1.1, dsn=4.0.0, status=deferred (host
smtp-in.libero.it[213.209.1.129] said: 451 too many messages, slow down.
[smtp-22.iol.local; LIB_650] (in reply to end of DATA command))
>
> The limit is triggered very quickly and it's removed after several hours.
> I tried to throttle the sending to IOL addresses on Postfix
(destination_concurrency_limit = 2 and destination_rate_delay = 300s), but
I keep getting capped after a while.
> I don't have much information regarding the old qmail server, but it
seems that there were not all these problems (there wasn't even DKIM and
DMARC configured!).
>
> I don't understand how to resolve these problems with the libero.it
mailboxes (and more generally, with all Italiaonline mailboxes). Do you
have a contact in Italiaonline who can help me?
> Any info would help me, thanks in advance.
>
> Regards,
> Claudio
--
Stefano Bagnara
Apache James/jDKIM/jSPF
VOXmail/Mosaico.io/VoidLabs
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