Email was fine for months, but now not...
Hi
Email was working fine for months for a client who has their web site hosted at Business Catalyst, but their email is hosted externally with 1&1.
However, on Saturday morning at 7am GMT, the emails stopped working.
To my knowledge, no settings have been changed in the BC Admin Panel for DNS.
Here are the DNS entries as of today...
$ host -v swifthire.co.uk
Trying "swifthire.co.uk"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41921
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;swifthire.co.uk. IN A
;; ANSWER SECTION:
swifthire.co.uk. 10800 IN A 192.150.8.140
;; QUESTION SECTION:
;swifthire.co.uk. IN AAAA
;; AUTHORITY SECTION:
swifthire.co.uk. 3600 IN SOA ns1.worldsecuresystems.com. admin.swifthire.co.uk. 1337130486 10800 3600 777600 7200
;; QUESTION SECTION:
;swifthire.co.uk. IN MX
;; ANSWER SECTION:
swifthire.co.uk. 10800 IN MX 10 mx00.1and1.co.uk.
swifthire.co.uk. 10800 IN MX 10 mx01.1and1.co.uk.
;; ADDITIONAL SECTION:
mx01.1and1.co.uk. 1095 IN A 212.227.15.150
mx00.1and1.co.uk. 2690 IN A 212.227.15.134
mx00.1and1.co.uk. 2690 IN A 212.227.15.150
mx00.1and1.co.uk. 2690 IN A 212.227.15.169
mx00.1and1.co.uk. 2690 IN A 212.227.15.186
mx01.1and1.co.uk. 1095 IN A 212.227.15.186
mx01.1and1.co.uk. 1095 IN A 212.227.15.134
mx01.1and1.co.uk. 1095 IN A 212.227.15.169
...and yet emails are not being received at the 1&1 mail servers.
I have logged a ticket with 1&1 Technical Support, but in the meantime...
Any ideas?
Thank you for your help.
Regards
Paully
The only minor problem I see in that setup is that both MX records have the same priority level, which is set to 10 - http://www.dnswatch.info/dns/dnslookup?la=en&host=swifthire.co.uk&type=MX&submit=Resolve
But that means that the mail may be sent to sometimes to mx01.1and1.co.uk and somatimes to mx00.1and1.co.uk.
1to1 recomendation is to set mx01.1and1.co.uk to 20 as per http://faq.1and1.com/domains/domain_admin/dns_settings/5.html
But this should not stop the mail from being delivered.
So, whatever the issue is it's certainly not at the DNS level and anyone who knows anything about DNS from 1to1 should be able to tell that by a simple DNS lookup.
Cheers,
-mario
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