Mail that leaves the server and is accepted at the other end.
Exim, Postfix and Dovecot on a VPS or dedicated server you already own. Queues, SPF, DKIM, DMARC, PTR and blacklists. The mailbox stays on your machine, not in a host we resell.
Your server. Your provider. Our Linux expertise.
The website is up. The message is not.
Delivery fails on the uninteresting records: no PTR on the new IP, an SPF that still names the old server, a DKIM key that was not copied in the migration, or a queue full of spam from a compromised mailbox. We read the log before changing the panel.
Queue, reputation, or a move
Queue frozen, 550 from the other side, authentication failures, a disk full of deferred spam. Standard work is €55/hour, minimum 1 hour.
PTR requested from the provider, SPF and DKIM aligned with the IP that actually sends, then a delist only where the listing is yours to clear.
IMAP copy onto the new server, then the DNS cut. Quoted from the mailbox count. The old server stays up until a test account receives mail.
HestiaCP and DirectAdmin hide the MTA. The log does not.
On Hestia the mail stack is Exim and Dovecot. DirectAdmin is usually Exim too. A rejection in the panel is still an Exim line. We work in the log and the DNS zone, then confirm the panel matches, including when Cloudflare is proxying the website and must not proxy the MX.
We cannot make a spam-listed IP trusted overnight
If the VPS IP is on a policy block and the provider will not replace it, the practical fix is a new IP or an external sender. We will say which, instead of resubmitting the same delist.
€55 an hour for a queue. A migration is quoted.
Emergency mail-down is €95/hour, subject to availability, not a guaranteed night shift. After the fix, backup of the mailboxes belongs in the offsite job, not only in the panel’s local dump.
Do not send mailbox passwords in the first message. If we need a test account, we ask for one you can delete afterwards.
Your server. Your provider. Our Linux expertise.
Mail queued, rejected, or not leaving the server?
Tell us the domain, the panel and the bounce text. We reply with the check before any change.