On 01.07.20 21:41, Ranjan Maitra wrote:
I am using postfix to send e-mail. My home machine is called xxx.sub.example.com (I am user with rm11) and my work email address is r...@example.com. My ISP at home is not through my employer but I use VPN through that. I use localhost as my smtp server and my e-mail address as the sendmail address. This has worked fine but today I got the following error/failure with two different recipient e-mail addresses. Here are the error messages (similar for both):This is the mail system at host xxx.sub.example.com. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <x...@xxxx.xxx>: host mx.smtp.xxxx.xxx[ip] said: 554 5.7.1 R:DNS - Message sourced from 70-81-125-2.client.isp.com [70.81.125.2] not allowed. For assistance e-mail <h...@it.xxxx.xxx>. (in reply to RCPT TO command)
you should apparently use SMTP servers of your employer when you send mail from your work mail address (r...@example.com). Only your employer's mail servers are allowed to send mail with @example.com as from address. configure postfix to use SMTP authentication and employer's SMTP servers.
Your IP address appears on the SMTP gateway blacklist. This means that you will not be able to send email messages directly from your computer system to any address here that passes through the SMTP gateway. You will need to use your ISP's mail servers to relay your email messages. Please consult your ISP if you need assistance. If you are attempting to send mail from a static IP address or you otherwise believe that your address should not be blocked, please contact our helpdesk via telephone at or via email. I am not sure what to do here, but would appreciate any advice. What I do not understand also is if I use VPN, why does it go through the ISP server which is blacklisted?
are you sure it goes through your ISP server? postfix tries to deliver mail directly by default, so it's apparently your home address that is blacklisted. -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. Support bacteria - they're the only culture some people have.
