Re: msgid and sending via email providers
On Wed, 3 Nov 2021 20:06:54 + Manfred Lotz wrote: > I have naively thought that claws-mail sets the message id. Wrong > reasoning on my side. Sorry. I wanted to say: I have naively thought that opensmtpd sets the message id. Wrong reasoning on my side.
Re: msgid and sending via email providers
On Wed, 3 Nov 2021 20:29:51 +0100 Tassilo Philipp wrote: > From your message I deduce that the message-id is added by your > client in the first place? In that case, no, I don't think OpenSMTPd > can be told to basically *replace* the message id for you. I have naively thought that claws-mail sets the message id. Wrong reasoning on my side. But of course, you are right that it is set by the mail client. Thanks a lot for this and for your other explanations! -- Manfred
Re: msgid and sending via email providers
About your original question: From your message I deduce that the message-id is added by your client in the first place? In that case, no, I don't think OpenSMTPd can be told to basically *replace* the message id for you. That said, OpenSMTPd as a standard compliant mail server will add or replace a message-id, *iff*: - this is a submission on port 587 - and if it is missing or an incorrect (syntax) one This is specified in [0] (RFC6409) under 8.3. In that very case, I think the "hostname" setting of the "listen" directive will be used for the message-id (the handling is around line 2750 in smtp_session.c), but might be wrong, haven't tested that. Either way, this wouldn't help you, I think. Also note that the MSA adding a missing message-id is only to ensure compliance with standards for other MTAs, though, b/c there are too many broken clients out there that don't add one to begin with. This byself isn't ideal actually (e.g. they give examples in that RFC under 8, like if this is added later on, it might mess with the validity of message signatures). Long story short, IMHO: - make sure your client adds such a header - make sure that the client adds it in the format you want Overall, I don't think that the content of the message-id header is used for spam detection... but who knows, mailer corps do all kinds of weird stuff... ... and speaking off weird stuff, about Leo's argument about t-online: what he writes is actually documented as-is by t-online's guide for server operators [1]. They say the "mail" in the hostname is "recommended", however, the part about the website with imprint sounds like a requirement, under 4.1 of [1]: "In particular, we recommend choosing a host name that indicates its usage as a mail server (eg. mail.example.com) and to ensure the host's domain leads to a website providing full contact details." I personally think this is messed up and agree with Leo here. But then again, the big mailers do whatever they want anyways, and always make it harder for the small and private ones, in one way or another, for the sake of whatever they claim. Anyone surprised here? [0] https://datatracker.ietf.org/doc/html/rfc6409 [1] https://postmaster.t-online.de/index.en.html On Wed, Nov 03, 2021 at 06:14:20PM +, Manfred Lotz wrote: On Wed, 3 Nov 2021 14:59:15 +0100 Leo Unglaub wrote: Hey, i am not sure if that is directly related to you problem, but t-online.de is one of the worst email providers i have ever seen. They eandomly block you for no reason. Last month i got bocked because the hostname of my email server did not contain the word "mail". They demandet that all of the sudden. Then they only accepted emails from my servers if on the same IP as the mailserver there was a websever that served a valid impress/legal notce. Totally nuts that t-online.de company. I have no problem with t-online.
Re: msgid and sending via email providers
On Wed, 3 Nov 2021 14:59:15 +0100 Leo Unglaub wrote: > Hey, > i am not sure if that is directly related to you problem, but > t-online.de is one of the worst email providers i have ever seen. > They eandomly block you for no reason. Last month i got bocked > because the hostname of my email server did not contain the word > "mail". They demandet that all of the sudden. Then they only accepted > emails from my servers if on the same IP as the mailserver there was > a websever that served a valid impress/legal notce. Totally nuts that > t-online.de company. > I have no problem with t-online.
Re: msgid and sending via email providers
Hey, i am not sure if that is directly related to you problem, but t-online.de is one of the worst email providers i have ever seen. They eandomly block you for no reason. Last month i got bocked because the hostname of my email server did not contain the word "mail". They demandet that all of the sudden. Then they only accepted emails from my servers if on the same IP as the mailserver there was a websever that served a valid impress/legal notce. Totally nuts that t-online.de company. Meybe this helps you a bit. Greetings Leo On 03/11/2021 14:38, Manfred Lotz wrote: Hi there, Could a msgid cause problems insofar as their content might be seen as an indicator that the mail is SPAM? My situation: I have a couple of email providers, where I send mails from. In Opensmtp I have something like this ... action "posteo.de" relay host smtps://pos...@posteo.de auth action "t-online.de" relay host smtps://tonl...@securesmtp.t-online.de auth ... Now when sending mail as manfred.lotz at posteo.de or manfred.lotz at t-online.de the msgid always contains the local hostname which is simply hogwart in /etc/hostname. My laptop is not registered with a dns lookable server name. Question: Is there a possibility to tell opensmtp to create a msgid like ed8c9804c3dda99d8207f4ae945cd...@posteo.de> instead of ed8c9804c3dda99d8207f4ae945cddcf@hogwart> when I send mails with From: manfred.lotz @ posteo.de? Same for the other account. Thanks.
msgid and sending via email providers
Hi there, Could a msgid cause problems insofar as their content might be seen as an indicator that the mail is SPAM? My situation: I have a couple of email providers, where I send mails from. In Opensmtp I have something like this ... action "posteo.de" relay host smtps://pos...@posteo.de auth action "t-online.de" relay host smtps://tonl...@securesmtp.t-online.de auth ... Now when sending mail as manfred.lotz at posteo.de or manfred.lotz at t-online.de the msgid always contains the local hostname which is simply hogwart in /etc/hostname. My laptop is not registered with a dns lookable server name. Question: Is there a possibility to tell opensmtp to create a msgid like ed8c9804c3dda99d8207f4ae945cd...@posteo.de> instead of ed8c9804c3dda99d8207f4ae945cddcf@hogwart> when I send mails with From: manfred.lotz @ posteo.de? Same for the other account. Thanks. -- Manfred
