553 validating sender

The mail system : host zsca-138961-mail2.customer.somethingbridge.com[156.111.222.16] said: 554-Transaction failed (id=4FE8B30610BE0008), maximum 8 recipients listed below: 554-Address:[email protected]_to_Server:999.5 Command: EODT Error:554 5.7.1 Message refused by DNSBL check. The email message was detected as spam 554 Transaction failed (in reply to end of DATA command) Hating to state the obvious, but the problem is that some of your users' emails are being rejected as spam."For further assistance, please send mail to postmaster" seems like a helpful suggestion. Anybody who sends email has seen them, in one form or another – those SMTP error codes, often returned in bounced email, such as “550 Requested action not taken: mailbox unavailable” or “550 5 2 1 mail from refused spam site.” These are often in response to SMTP commands that have ‘gone wrong’ between your email server that sent the email, and the receiving email server that is unable to deliver it (or refuses to deliver it) for some reason. Unfortunately, many receiving systems seem to mix and match these error messages, rather than adhering to the prescribed code messages. (‘SMTP’ stands for Simple Mail Transfer Protocol.) First, here is a list of SMTP codes and error codes, and what each message is supposed to say and mean: 211 – A system status message. (on their side) 452 – The command has been aborted because the server has insufficient system storage.Patient-physician communication is an integral part of clinical practice.When done well, such communication produces a therapeutic effect for the patient, as has been validated in controlled studies.I can think of a few things that might be wrong (on the recipient's end): 1. Regarding point 2, I get the same bounce when they send an email and I hit "reply to"...

Many of these efforts, however, focus on medical schools and early postgraduate years and, therefore, remain isolated in academic settings.Ask them why they're rejecting your emails as spam, and then correct the issue. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).Would you like to answer one of these unanswered questions instead?Almost always, this means that the inbox either no longer exists, or that it never existed!Why would you have an email address on your mailing list that has never existed?Para: [email protected]: Undelivered Mail Returned to Sender This is the mail system at host mail182-ch112-RR.

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