SMTP and IMAP built around your sending
Custom SMTP is priced for your setup. Tell us your volume, hosting and IP needs, and Arcinbox plans the domains and mailboxes to match, then sets them up and watches them.
Connects to Smartlead and Instantly directly, and to any other sequencer over SMTP and IMAP
SmartleadDirect sync
InstantlyDirect sync
lemlist
EmailBison
PlusVibe
Saleshandy
Woodpecker
ApolloStandard plans stop where your setup starts
Some teams need their own volume, hosting or IPs, and a fixed mailbox plan was never built for that.
Volume outgrows the plan
A fixed plan caps what each mailbox can send, so more volume means more accounts to juggle.
Someone else's reputation
On shared infrastructure, another sender's habits can land on the IPs you send from.
Every tool connects differently
Each sequencer wants its own settings, and one wrong field stops a campaign before it starts.
Planned with you, then run for you
We size the setup with you on a call. After that, Arcinbox sets up, connects and watches your mailboxes like any other.
Set up to your plan
Arcinbox sets up the domains and mailboxes your plan calls for, publishes the records, and puts a sender name on every mailbox.
- Sized for your volume, hosting and IPs
- SPF, DKIM, DMARC and MX on every domain
- A sender name on every mailbox
SPF, DKIM, DMARC and MX published.
SMTP and IMAP for each one.
A name on every mailbox.
In lemlist, warming.
Works with most sequencers
SMTP for sending and IMAP for replies is the connection almost every sequencer supports, so the tool you use keeps working as it is.
- SMTP for sending, IMAP for replies
- Smartlead, Instantly, lemlist and more
- Connected as part of the setup
lemlist42 mailboxesSMTP and IMAPEmailBison30 mailboxesSMTP and IMAPSmartlead18 mailboxesSMTP and IMAPWarm before the first campaign
New mailboxes warm up free, and each one shows how many days it has left before real campaigns.
- Free warmup, with no separate subscription
- Days left shown on every mailbox
- Ready for campaigns on day 21
Watched like every Arcinbox mailbox
ArcWatch watches every domain and mailbox in your setup. A listing or a broken record arrives with its cause and what to do next.
- Listings flagged the same day
- Broken records caught after setup
- Every problem arrives with its cause
- How ArcWatch works
DKIM record changed at 08:30.
An edit at the hosting provider.
Flagged with the fix at 08:31.
Fixed in one click. Nothing bounced.
Spread your sending across providers
Buy Google, Microsoft, Azure and custom SMTP mailboxes in one order. Arcinbox sets them all up the same way.
Plan your SMTP setup
Book a discovery call and tell us your volume, hosting and IP needs. We will size the setup with you.