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Greetings, Steve_Brady!<br />
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Are you allowed to send emails outside your organization? &nbsp;There may be a group policy blocking the sending of emails. &nbsp;Check swith your IT Administrator.<br />
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Cheers!
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Greetings, Steve_Brady!

Are you allowed to send emails outside your organization?  There may be a group policy blocking the sending of emails.  Check swith your IT Administrator.

Cheers!

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We are allowed. &nbsp;I was sending e-mails fine until recently, when I turned the send/receive settings off because I wanted to log into my e-mail account from another location. &nbsp;It is when I started sending/receiving from Outlook again that I experienced this problem. &nbsp;
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We are allowed.  I was sending e-mails fine until recently, when I turned the send/receive settings off because I wanted to log into my e-mail account from another location.  It is when I started sending/receiving from Outlook again that I experienced this problem.  

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What email service is this? &nbsp;Your administrator may be blocking the default SMTP port. Try alternate port 26 or 587.
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What email service is this?  Your administrator may be blocking the default SMTP port. Try alternate port 26 or 587.

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oh, I forgot ... I'm sure your ISP will let you do SMTP authentication, too. The error message you quoted (&quot;... You must ... SMTP Auth ...&quot;) suggests that. Ask your ISP what exactly he requires. He'll most probably have a step-by-step guide.
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oh, I forgot ... I'm sure your ISP will let you do SMTP authentication, too. The error message you quoted ("... You must ... SMTP Auth ...") suggests that. Ask your ISP what exactly he requires. He'll most probably have a step-by-step guide.

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When attempting to send e-mail though Outlook, I am receving this undeliverable message: &nbsp;&quot;The following recipient could not be reached. 550 You must check your mail from this IP or SMTP Auth before sending to...&quot;<br />
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This happens with all e-mails except to those within my own organization.<br />
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Thanks!
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When attempting to send e-mail though Outlook, I am receving this undeliverable message:  "The following recipient could not be reached. 550 You must check your mail from this IP or SMTP Auth before sending to..."

This happens with all e-mails except to those within my own organization.

Thanks!

Emails returned as undeliverable

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.