Nel forum non ho trovato soluzione al problema, ci sono un paio di segnalazioni simili ma con problematiche di fondo differenti.
Questo è quanto succede, dopo l'invio da client Thunderbird (ultima versione 24.4), in risposta da Mail delivery Service arriva un messaggio che riporto parzialmente (e con le x che coprono i dati sensibili), provato più volte, anche disconnettendo il router e riprovando e arriva sempre lo stesso errore:
- These recipients of your message have been processed by the mail server:
xxxxxxxxxx@qq.com; Failed; 5.5.0 (other or undefined protocol status)
Remote MTA mx3.qq.com: SMTP diagnostic: 554 RBL deny; Client host blocked by Spamhaus.org; http://www.spamhaus.org/query/bl?ip=212.52.84.112
Reporting-MTA: dns; outrelay08.libero.it
Received-from-MTA: dns; [127.0.0.1] (151.65.15.192)
Arrival-Date: Sat, 5 Apr 2014 22:14:02 +0200
Final-Recipient: rfc822; xxxxxxxxxx@qq.com
Action: Failed
Status: 5.5.0 (other or undefined protocol status)
Remote-MTA: dns; mx3.qq.com
Diagnostic-Code: smtp; 554 RBL deny; Client host blocked by Spamhaus.org; http://www.spamhaus.org/query/bl?ip=212.52.84.112
Premesso che, in riferimento all'invio a quell'indirizzo di QQ (non ho al momento riscontrato anomalie su altri indirizzi ma non lo escludo dato che spedisco sempre ai soliti due o tre...):
-da Thunderbird se invio solo una mail di testo la consegna viene effettuata
-da Thunderbird il messaggio è stato bloccato allegando un normalissimo file mp3
-da webmail di Libero lo stesso identico messaggio con mp3 è stato inviato correttamente senza blocchi
-sto spedendo da indirizzo di Libero su rete Wind\Infostrada quindi stesso operatore
-le impostazioni di Thunderbird sono quelle indicate da Libero (IMAP):
Nome server imapmail.libero.it
Porta 993
Server SMPT smtp.libero.it
Porta 465
Sicurezza della connessione SSL/TLS
Metodo autenticazione password cifrata
Dovrei provare altre impostazioni? Le porte sono quelle... ho anche già segnalato all'assistenza di Libero che non ha saputo risolvere il problema.
Quindi da webmail funziona mentre da client Thunderbird no, perchè?
Andando a vedere il link spamhaus non risulta in lista l'IP e nemmeno il dominio libero.it quindi in effetti non ci sarebbe alcun blocco.
In queste faq c'è scritto che però è possibile essere bloccati comunque per molti altri motivi
http://www.spamhaus.org/faq/section/...0Questions#213Is my e-mail address listed in SBL?
"No" is the short answer. Spamhaus lists (SBL, XBL, PBL, DBL) can not list e-mail addresses! It is physically impossible for our lists to contain e-mail addresses. Spamhaus lists only include IP addresses or domains, not e-mail addresses.
An IP address is the numeric address of a machine connected to the Internet. IPs are usually written in a dotted quad format like this: 123.45.67.89. A single IP can host no domains, one domain, or many domains, and it can host no servers, one server, or many servers or other devices. Similarly, a domain or hostname can point to any number of IP addresses. There is not a 1:1 relationship between IPs and domains!
A domain name (for example "spamhaus.org") is associated with one or more IP addresses via the fundamental part of the Internet called the Domain Name System (DNS). The owner of a domain name can point the DNS for their domain to any IP they choose...hopefully one they have permission to use!
E-mail, with its addresses in the form of "user@domain", relies on the DNS system for delivery of messages. Messages are delivered to the MX record of the recipient's domain. However, the sender can send e-mail using their own address from many servers, in fact from nearly any server where they are authorized, for example by using SMTP AUTH. So, if you are sending legitimate mail and you find your mail rejected due to the IP address you are sending from, try sending your mail out via a different server on a different IP address. Your ISP or IT service can help you configure your mail program to make that connection.
You can check whether an IP address or domain is in any Spamhaus list with our lookup form.
Is my IP address listed in SBL?
This lookup form will tell you if an IP is in any of our DNSBL zones (lists). That data is the most current available but the data in our public mirrors should be accurate within about 15 minutes (caching and update time). Links from that lookup will show you which of our zones lists the IP (SBL, XBL or PBL) and how to have it removed.
Sometimes people see a rejected e-mail but don't see their IP in a Spamhaus list. That could be for several reasons. One is that the listing may have expired or otherwise been removed. Another is that there are many other reasons that e-mail is rejected, including many other DNSBL lists, public and private. Well-configured servers will give the sender accurate information about why a message was rejected, but there are some less well configured servers that simply say any rejection was due to Spamhaus (or sometimes some other reason or no reason at all).
The best person to ask is the administrator of your mail server, followed by the administrator of the server that rejected your mail. Be prepared to show them the actual rejection message from the rejecting server ("Delivery Status Notification", sometimes called a "bounce").
Analizzando la situazione quindi il problema è legato a Thunderbird o a qualche sua impostazione, come risolvere?
Grazie.
