Emails sent from my email client has been generally reliable. However, when sending emails from Horde (accessed by www.domain.com/webmail) some recipients don't receive the emails (particularly some @outlook.com email addresses). This is the error message I got from outlook.com:
"Unfortunately, messages from [208.***.**.28] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140)."
If emails sent from my email client are sending to those same email addresses with no problem, then most likely my email client is using a different IP than Horde is using. When I do a SPF record check on my domain, I see about 20 different IP addresses including the one listed above in the error message. First of all, is it normal to see so many IP addresses associated with your domain in a SPF check? If so, is there a way to configure Horde to send using a different IP, like the same IP as my email client or any other IP that has not been blocked?
"Unfortunately, messages from [208.***.**.28] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140)."
If emails sent from my email client are sending to those same email addresses with no problem, then most likely my email client is using a different IP than Horde is using. When I do a SPF record check on my domain, I see about 20 different IP addresses including the one listed above in the error message. First of all, is it normal to see so many IP addresses associated with your domain in a SPF check? If so, is there a way to configure Horde to send using a different IP, like the same IP as my email client or any other IP that has not been blocked?
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