Such discontinued services mark all incoming mails as spam to force customers to stop using it. we’ve seen servers that used discontinued DNSBLs such as ORDB, Virbl, etc. The most common reason for this error is IP blacklisting, where the sender’s server IP is listed as a spam source in SpamHaus, Senderbase, or other such email reputation tracking services.ĭNS blacklists (aka DNSBL) are a great way to keep out potential spammers.īut it can easily backfire if the anti-spam settings are misconfigured.įor eg. These third party services analyze incoming mail and classify them as spam or not-spam based on the sender’s server IP, message header, attachments, and more.Īlmost all mail servers refuse to admit mails marked as spam, and it shows the error “ 550 Email blocked“. Mail servers use 3rd party services such as SpamCop, MSRBL, JunkEmailFilter, etc. What causes the error “550 Email blocked”? It means that the recipient’s mail server rejected the mail from mx. because the spam filter at classified the mail as spam. ![]() The mail system : host said: 550 Email blocked by (in reply to RCPT TO command) I'm sorry to have to inform you that your message could not be delivered to one or more recipients. Here’s a typical bounce message: -Original Message-įrom: Mail Delivery System Thursday, J02:22 PM Post questions, follow discussions and share your knowledge in the Community.Here at, our Support Engineers maintain and support servers of web hosts, digital marketers and other online businesses.ĥ50 Email blockedis an email bounce error that we usually see in Shared servers, VPS servers and Cloud Instances. To get help and troubleshoot other Microsoft products and services, enter your problem here. If you can't sign in, click here.įor other help with your Microsoft account and subscriptions, visit Account & Billing Help. To contact us in, you'll need to sign in. If the self-help doesn't solve your problem, scroll down to Still need help? and select Yes. To get support in, click here or select Help on the menu bar and enter your query. If using POP doesn't resolve your issue, or you need to have IMAP enabled (it's disabled by default), contact GoDaddy support. If you're using a GoDaddy account, follow these instructions to reconfigure your GoDaddy account to use POP. ![]() ![]() For instructions about how to reconfigure your account to use POP, contact your email account provider. To resolve this, remove the connected IMAP account in and reconfigure it as a POP connection. If you use to access an account that uses a domain other than or you might not be able to sync your accounts using IMAP. Select This was me to let the system know you authorize the IMAP connection.Īttempt to connect to the account via your IMAP client.įor more information on how to use the Recent activity page, go to What is the recent activity page? Under Recent activity find the Session Type event that matches the most recent time you received the connection error and click to expand it. Go to /activity and sign in using the email address and password of the affected account. We’re working on a fix and will update this article when we have more information. You may receive a connection error if you configured your account as IMAP in multiple email clients.
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