Newsletter and IP/SPF issue
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I've not been receiving my newsletter and daily news emails this week. When I check my logs it appears that they're being rejected on an SPF failure. Digging deeper it appears that the SPF record for codeproject.com has changed to using IP addresses, but the first SPF record I hit is on maillist.codeproject.com. The maillist domain's SPF record uses hostnames. The hostnames and ips in the two records match, but although the ips reverse-resolve, the names don't resolve. $ dig codeproject.com TXT ... codeproject.com. 3096 IN TXT "v=spf1 ip4:69.10.233.30 ip4:69.10.233.34 ip4:69.10.233.35 ip4:69.10.233.30 ip4:69.10.233.40 ~all" ... $ dig maillist.codeproject.com TXT ... maillist.codeproject.com. 3600 IN TXT "v=spf1 a:mail4.maillist.codeproject.com a:mail5.maillist.codeproject.com a:mail1.maillist.codeproject.com a:mail2.maillist.codeproject.com a:mail3.maillist.codeproject.com -all" ... $ host mail4.maillist.codeproject.com Host mail4.maillist.codeproject.com not found: 3(NXDOMAIN) $ host 69.10.233.34 34.233.10.69.in-addr.arpa domain name pointer mail4.maillist.codeproject.com.
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I've not been receiving my newsletter and daily news emails this week. When I check my logs it appears that they're being rejected on an SPF failure. Digging deeper it appears that the SPF record for codeproject.com has changed to using IP addresses, but the first SPF record I hit is on maillist.codeproject.com. The maillist domain's SPF record uses hostnames. The hostnames and ips in the two records match, but although the ips reverse-resolve, the names don't resolve. $ dig codeproject.com TXT ... codeproject.com. 3096 IN TXT "v=spf1 ip4:69.10.233.30 ip4:69.10.233.34 ip4:69.10.233.35 ip4:69.10.233.30 ip4:69.10.233.40 ~all" ... $ dig maillist.codeproject.com TXT ... maillist.codeproject.com. 3600 IN TXT "v=spf1 a:mail4.maillist.codeproject.com a:mail5.maillist.codeproject.com a:mail1.maillist.codeproject.com a:mail2.maillist.codeproject.com a:mail3.maillist.codeproject.com -all" ... $ host mail4.maillist.codeproject.com Host mail4.maillist.codeproject.com not found: 3(NXDOMAIN) $ host 69.10.233.34 34.233.10.69.in-addr.arpa domain name pointer mail4.maillist.codeproject.com.
Thanks - I've sent this to Vince who will look into it and Make Things Better.
cheers, Chris Maunder The Code Project | Co-founder Microsoft C++ MVP
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Thanks - I've sent this to Vince who will look into it and Make Things Better.
cheers, Chris Maunder The Code Project | Co-founder Microsoft C++ MVP
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I am missing my newsletter delivered to my work email address too. :( No more lunchtime entertainment. I just want to say those tag lines you guys come up with are classic. Cheers Guys.
Send me a PM with yor contact info and we can sort it out. Most likely its some sort of spam filter or DNS resolution issue. Quick things to try would be to clear you mailservers DNS cache. We had made a few changes to our mailing DNS setup, and some mailservers hold longer caches then what they should to try and keep DNS lookups down. If you have any copies of log files of the failures that would be great, or if we can setupa time where I can shuffle out some test messages to you that would also help to figure out whats going on.