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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!
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<indicator name="Faults">[[File:Menu-email.svg|link=:Category:Email|30px|Back up to the Email Category]]</indicator>
<indicator name="Faults">[[File:Menu-emailadd.svg|link=:Category:Email Features|30px|Back up to the Email Features Category]]</indicator>
tertiary-mx.co.uk is our backup email server. It will accept email for a domain we handle email for and will queue messages and will attempt to deliver to the higher priority MX record.
*Invalid HELO
*Recipient domain is not one we handle email for
*Message size is over
*The server will 'greylist' hosts. It will always defer (cause a temporary delivery failure) messages/connections under the following circumstances:
*Sending host in a DNS
*Header syntax errors
*Recipient rejected by the primary MX (It does a call back to the primary MX if it is available)
===etrn===
To force
etrn #your-domain.co.uk
quit
221 relentless.aa.net.uk closing connection
Note that tertiary-mx has various measures in place to discourage spam. You need to wait until after the "220 You are 2001:8b0:0::1" line is printed before you can issue the etrn, which may take a few seconds. Mismatching forward/reverse DNS etc. may upset it when you try to telnet in. If possible telnet in from your mail server itself, as that is more likely to look trustworthy.
==Setup==
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