An incoming SMTP feed is where incoming mail is sent directly to your mail server without going through your ISP's POP3 mail server on the way.
An incoming SMTP feed has several advantages over going via a POP3 mailbox:
However there are a few gotchas to watch out for:
With the above restrictions, if your Internet connection or mail server goes down for a short time, it is usually no problem at all. Well configured mail servers will queue and retry messages which failed to send, usually for up to 3 days, because the Internet is never 100% reliable. However if it is possible that your mail server may be down for more than 3 days, then you should consider either not using SMTP, or using a backup SMTP mail service which can take over if your main mail server fails.
There is usually nothing you need to do in VPOP3, as it is always listening out for incoming SMTP connections.
Usually all you need to do is:
Local Domainssetting (in Settings → Local Mail → General) contains your domain name(s) - if there are multiple domains, separate them with semi-colon characters (';')
If you have changed the VPOP3 settings from the defaults, then you may need to make some changes. Go to Services → SMTP, then:
Do not require SMTP authentication for internal/incoming mail
Reject unrecognised local recipients
SMTP Anti-Relay Protectionmethod is set to
Check Client IP Address
Default for your LANbutton.
When you have the SMTP Anti-Relay Protection method set to
Check Client IP Address the Access Restrictions tell VPOP3 which mail servers can send outgoing mail through VPOP3 - all computers on the Internet can send mail TO VPOP3 users, so incoming mail will work fine, even if it looks as if the sending computer address may be blocked.
If you have a support contract with us, we will be glad to help you with this, as it can sound complicated if you do not have experience in doing this. Alternatively you can purchase a technical support incident (or take out a contract) and we wil be able to help you, including setting it up remotely for you.