Your mail server is configured as an open relay or proxy.Ĥ51 VS1-MF Excessive unknown recipients – possible Open Relay (#4.4.5) This error indicates that our servers were busy and temporarily unable to process your transaction at the time of connection.Ĥ51 VS1-IP Excessive unknown recipients – possible Open Relay (#4.1.8) We’re seeing a high volume of e-mails from your server that are indicative of unsolicited mailings.Ĥ51 Resources temporarily not available – Please try again later We’re seeing unusual traffic patterns from your server or your mailings are generating complaints from Yahoo Mail users.Ĥ21 4.7.1 Messages from x.x.x.x permanently deferred. We’re seeing unusual traffic patterns from your server. The message content contained objectionable content, we’re seeing unusual traffic from your servers, or emails from your mail server are generating complaints from Yahoo Mail users.Ĥ21 4.7.0 Messages from x.x.x.x temporarily deferred due to user complaints – 4.16.55 Or 553 5.7.1 Connections will not be accepted from 1.2.3.4,Ĭheck this list of Yahoo’s SMTP Error Codes so you know exactly why you are unable to deliver emails: SMTP ErrorĤ21 Message temporarily deferred –
Typically, when Yahoo blocks the IP, you receive a bounce message with the following error codes: 421 4.7.0 Messages from temporarily deferred due to user complaints If Yahoo blocks your IP and rejects the message, the email placement result is “Undelivered.” To find it out, you can run an email deliverability test with GlockApps. Unlike public blacklists, there is no way to do a quick Yahoo blacklist IP check. These are often junk accounts that receive tons of spam messages. Some users may just forward all of their emails to Yahoo. This problem is often seen with shared hosting servers. If you forward an email to a Yahoo address and you then mark it as spam, Yahoo will penalize your server. – Bulk forwarding of spam emails to Yahoo users. – Bulk emailing to unconfirmed subscribers. – Bulk emailing from mailing lists, newsletters, forums, and blogs (even if they are opt-in). – Compromised user accounts used to send spam. Typical behavior that leads to blacklisting issues is: IPs listed in Spamhaus and other spam databases.Here are the factors that impact the sender reputation: But like most mailbox providers, Yahoo looks at the sender’s IP reputation to decide if an email should go through and where it should be placed. Yahoo does not disclose specific information about its email filtering practices. Mailbox providers are forced to introduce filters and blacklists to protect their users from unsolicited emails. Users of Yahoo, Google, Hotmail, and other major mailbox providers are often victims of spammers. Can’t send emails to Yahoo subscribers? It’s highly possible that your sending IP address was blacklisted by this provider.
0 kommentar(er)
