[mailop] Anyone from sendinblue on this list?

Hi If anyone from sendinblue is reading here. We have repeated issue of tracking URI used by sendinblue get used in emails sent to our spamtraps/honeypot mimiking an open relay, causing the sender ip (not from the network of sendinblue) and 'spamvertized' trackingdomain to get blacklisted, thus l

Re: [mailop] Recommended ciphers used for ESMTP connections

On Mon, Mar 04, 2024 at 05:30:54PM +0100, Cyril - ImprovMX via mailop wrote: > On our send, we decided to use the ciphers suggested by Mozilla on their > SSL Configuration Generator (https://ssl-config.mozilla.org/) (level > "Intermediate") but I'm aware it's more for the HTTPS connections that > E

Re: [mailop] Recommended ciphers used for ESMTP connections

Thank you everyone for your responses. It makes sense to not have a restricted set of ciphers. Eray, your explanation made perfect sense and adding the precision about no known downgrade attack makes me revise the cipers we use. I'm also going to read the PDF eBulldog shared. Thank you all so muc

Re: [mailop] Recommended ciphers used for ESMTP connections

On 04/03/2024 18:30, Cyril - ImprovMX via mailop wrote: And we only accept TLS at v1.2 and higher. Because SMTP is opportunistic you can't be too restrictive. Allowing TLSv1.1 would likely provide more compatibility. If you want to enforce security, implement MTA-STS. OpenSSL has built-in p

Re: [mailop] Anyone from sendinblue on this list?

Hi Benoît, We can discuss this offlist. Thanks ! Simon On Tue, Mar 5, 2024 at 9:37 AM Benoit Panizzon via mailop wrote: > > Hi > > If anyone from sendinblue is reading here. > > We have repeated issue of tracking URI used by sendinblue get used in > emails sent to our spamtraps/honeypot mimiki

Re: [mailop] Recommended ciphers used for ESMTP connections

Dňa 5. 3. o 0:15 Christer Mjellem Strand via mailop napísal(a): That said, we still decided to deviate from them *only* for SMTP (and not for i.e. Submission). The reason for this decision comes down to the number of poorly configured servers out there, and the fact that TLS in SMTP is still o

Re: [mailop] Any Apple guys, with knowledge of their networks shed some light on this IP Space?

On 2024-03-04 at 18:00:24 UTC-0500 (Mon, 4 Mar 2024 15:00:24 -0800) Michael Peddemors via mailop is rumored to have said: Does anyone know what this IP space is assigned for in general? Tracking some new threats.. inetnum:144.178.0.0 - 144.178.63.255 descr: Apple Inc status:

Re: [mailop] Dot as the first character of a line ? (RFC 5321, Section 4.5.2)

We finally found the original issue. It was related to the library from the sender that was dot stuffing using a regex without the Global flag in place... They sent a PR to the library. I learned some stuff with this issue ! Thanks everyone for your help here. Best regards, Cyril __

[mailop] Mimecast anybody?

Hi *, is there anybody out there, affiliated with Mimecast? Please can you contact me via private mail? We're experiencing certifiate issues on incoming connections from (probably) mimecast operated servers after re-issuing our local certificates. Best regards from Dresden/Germany Viele

Re: [mailop] Filter out emoji from email adresses

You may need to do some more work to be more specific in what causes the crashes, so that you can have a more targeted approach. Ie, is this a case of the client not handling an EAI message (raw utf-8 in the from header), is it specific to specific characters, is it specific to the being in the "c

[mailop] mimecast "antispoofing"

I just had a bounce, when a member of the list posted, from what is presumably a mimecast served company, to one of my club lists. The member's own copy of the list posting was bounced by his provider with 550 Rejected by header based Anti-Spoofing policy: [member's address redacted] - http

Re: [mailop] mimecast "antispoofing"

On 3/5/2024 3:01 PM, Julian Bradfield via mailop wrote: What should they be doing according to "best practice"? Not rejecting mail based solely on SPF results. - Mark Alley ___ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/ma

Re: [mailop] Filter out emoji from email adresses

Am 04.03.24 um 22:40 schrieb Sebastian Nielsen via mailop: Anyone that have a general algoritm to filter out emoji from sender addresses? It's possible that the problem isn't specific to emojis but to any unicode code point in the supplementary planes (code point values above U+). Applicat

[mailop] Anyone from Microsoft?

Hi All, As we continue to warm up some new mail servers, we're getting rate limited on one of them, with the following error: 451 4.7.650 The mail server [45.79.224.9] has been temporarily rate limited due to IP reputation. For e-mail delivery information, see https://postmaster.live.com (S775) [

[mailop] Anyone from Yahoo?

Hello everyone- We had an incident where a trusted connection from Microsoft had a nice large dump of spam - it appears that several of their customers were compromised. We've stopped it, and we're sure it's not going to happen again, but yahoo has listed our IP address blocks with a dreaded "5

Re: [mailop] Anyone from Microsoft?

On Tue, 5 Mar 2024 14:59:09 -0800, Mark Fletcher via mailop wrote: >Is there somewhere else I should be looking? You might wish to consider omphaloskepsis. The chances of a useful outcome will be closely similar. mdr ___ mailop mailing list mailop@m