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"550 broadcast not permitted" error from recipients server. Why??

"550 broadcast not permitted" error from recipients server. Why??



I am having disturb sending email to known good addresses on the same domain. I don't own any difficulty with addresses on other domains. I get the error '550 broadcast not permitted'. However, this error is not being generated by my own ISP's server, it is being generated by the recipients server. The error word is arriving in a 'mail assignment failure' absolute email from the recipient's ISP. Any ideas? TIA Best Answer - Chosen by Voters

Based on your skill to send post to other domains then the recients email server is sendiing this word back to your email server. You narrate your tech back folks or your email provider. The greatest probable cause is someone's anti spam protection.

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