Error 550 Invalid Helo

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All summed up: I have a colocated server that hosts about 70 sites on an IP. They each have their own sendmail config etc. One domain, has an MX record that points to an Exchange box here in the office. When I send.

A client recently switched to Exchange Server / Outlook for their email. Since then emails from my company to any email address at their company bounce back from the.

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Feb 14, 2014. SMTP error from remote mail server after MAIL FROM:<[email protected]> SIZE= 8943: host []: 550 Access denied.

Cannot send the message. Verify email address in your account properties. The server responded: 550 Access denied – Invalid HELO name (See RFC2821

XXX stands for an SMTP error message. Some samples: 550 : access refused; 501 : invalid hostname; 450 : unknown address, client, or hostname; Possible restrictions.

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Server says: 550 Access Denied – Invalid HELO name usually occurs when the SMTP Domain name does not match the senders email address.

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Fix error 550 in 2 Minutes. By

An error message '550 Access denied – Invalid HELO name' appears when sending email through outlook or other mail clients on exim / cPanel server.

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Jul 6, 2012. Follow these steps to fix the The Server Responded 550 Access Denied – Invalid HELO Name See RFC 2821 error. Go to your mail.

SMTPD(8) SMTPD(8) NAME smtpd – Postfix SMTP server SYNOPSIS smtpd [generic Postfix daemon options].

Feb 4, 2016. If you are receiving "550 Access denied – Invalid HELO name" (or a similar error message) in your email client, please check your settings as. – bouncing mail to legit recipients – Essentially = if your account is using IS’ backbone. Your problem sounds software; see what 550 error’s the messages are being rejected with to narrow the possibilities down.

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