> We’re an ESP (Leadhub) investigating a delivery issue on one of our sending > ranges. Since at least early September, every connection from > 167.99.253.0/24 to the comcast.net MX hosts is dropped before the SMTP > greeting:
Can't help you with Comcast, but a couple of questions come to mind: You have a /24 that's not indicated as being owned by you (or anybody else than the VPS provider) in ARIN WHOIS, which requires that suballocations of /29 or more must be explicitly announced? You are expecting to deliver any mail at all, perhaps even serious quantities of mail, out of Digital Ocean droplets? Just my €.02... -- Atro Tossavainen, Founder, Partner Koli-Lõks OÜ (reg. no. 12815457, VAT ID EE101811635) Tallinn, Estonia tel. +372-5883-4269, https://www.koliloks.eu/ _______________________________________________ mailop mailing list -- [email protected] To unsubscribe send an email to [email protected]
