Invoices and documents from your ERP or billing software by e-mail, through SMTP Relay

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The short answer: the ERP or billing program that already e-mails invoices only needs different SMTP details: the Email Center server, port 587, the credential and a sender such as billing@yourcompany.com. With the domain verified and DMARC in place, invoices arrive signed by your domain, and every send is in the log, with its status.

Before you switch

1 Verify the domain in the Email Center: see getting started with SMTP Relay.
2 Create a credential just for the ERP, for example «ERP invoicing».
3 Pick the moment: avoid changing the details at the end of the month, when most invoices go out.

The fields in the program

Field What to enter Why
Server, port, encryption The one in the Connection card, 587 with STARTTLS (or 465 with TLS). These are the relay details.
Username and password The ERP credential ones. If the ERP is replaced, you revoke only this one.
Sender billing@yourcompany.com Tells the customer straight away what the e-mail is.
Reply-To The accounts mailbox. Customers reply to invoices, and those replies must not get lost.
Subject With the invoice number and the company name. Helps the customer find the invoice and trust it.

The ERP runs in the office

Many billing programs run on a computer or server in the office. There, the port may be blocked by the office network or the internet provider. If the program cannot connect on 587, try 465 with TLS. If neither gets through, the office firewall has to let them out.

Fake invoices are one of the most common e-mail scams. With DMARC published, a server receiving an «invoice» from your domain without your signature can refuse it. That protects your customers and your name: see someone is sending e-mail in the name of your domain.
A customer says the invoice never arrived? Before you resend, look it up in the Email Center log: it says whether it was delivered, bounced or whether the address is blocked. See finding the e-mail in the log.

SMTP Relay is priced per e-mail sent, with a volume discount. Tell us how many invoices and other e-mails you send each month and we will prepare the proposal.

Ask for a proposal

SEE ALSO

The program says sent, the customer got nothing: finding SMTP e-mails in the Email Center log

Which sender addresses SMTP Relay accepts: verified domains, several domains, name and Reply-To

Someone is sending e-mail in the name of your domain: what SPF, DKIM and DMARC do about it

SMTP Relay not sending: connection, TLS, login, sender and recipient problems, one by one

WHMCS e-mails landing in spam or not sent: SMTP settings, sender address and templates

How SMTP Relay is priced: paying per e-mail sent, volume discounts and asking for a proposal

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