Re: [courier-users] SPAM over SMTP
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Re: [courier-users] SPAM over SMTP
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From: Andrew A. <and...@gm...> - 2023-01-26 18:31:26
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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">You need to implement all the relevant protocols (like dkim) in your dns entries and outbound filters. I can’t provide more details specific to courier but someone else may.</div><div dir="ltr"><br><blockquote type="cite">On Jan 26, 2023, at 12:32 PM, Alexey Ivanov via courier-users <cou...@li...> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"> <div>Hi,</div><div> </div><div>Recently I have started to receive SPAM from mail.governorsperic.xyz</div><div>The porblem is, that that MTA allows to smbd may be to the owner</div><div>to send emails like from (in my case) my domain, which won’t work otherwise</div><div>over IMAP. I have banned that domain in my local DNS, but it didn’t help.</div><div> </div><div>As commonly used by companies, mostly start-ups the domain name</div><div>in the email and responsible MTA agent are not matching like in my case.</div><div> </div><div>One of the best examples is outlook.office365.com, which work for many</div><div>domains not related to the given one.</div><div> </div><div>May be I was not clear…</div><div>here an example:</div><div> </div><div>SMTP = smtp.office365.com</div><div>EMAIL = <a href="mailto:na...@my...">na...@my...</a></div><div> </div><div>Obviously I don’t have control over smtp.office365.com</div><div>But I don’t wish any one send me an email with address like:</div><div><a href="mailto:na...@my...">na...@my...</a></div><div> </div><div>because, that user is (may be) not existent and surely not authenticated.</div><div> </div><div>What is the best practice to do in such a case?</div><div>Ban mail.governorsperic.xyz from sending me mails? But they can create</div><div>another one like that. What if it will be smtp.office365.com ?</div><div>I cannot ban it obviously w/o loosing tons of emails.</div><div> </div><div>I wish that no one can send me emails from outside with my own domain,</div><div>what ever server it might be!</div><div> </div><div>If they will be using other domain (not mine) I don’t have any chances</div><div>to prove, whether it is valid mail address (domain) or not. At least it would be less confusing.</div><div> </div><div>P.S. I know, that field FROM — can contain anything, not even related to the origin domain.</div><div> </div><div>Thx</div><div> </div><div> </div><div> </div><div> </div><div> </div><div>--<br>Alex</div> <span>_______________________________________________</span><br><span>courier-users mailing list</span><br><span>cou...@li...</span><br><span>Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users</span><br></div></blockquote></body></html> |
