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FAQ
Why do my emails look different in Outlook vs Gmail?
Email clients render HTML differently. Outlook uses Microsoft's rendering engine rather than a browser enginer which means certain CSSproperties — flexbox, grid, background images — are ignored or broken. Gmail strips out blocks in some contexts. ITPison•sinfrastructure delivers your HTML as sent; rendering differences originate at the client level. Using inline CSS and table-based layouts remainsthe most reliable approach across clients.
Does ITPison support dark mode email styling?
ITPison delivers your HTML as constructed. Dark mode adaptation is handled by the email client. You can include @media (prefers-color-scheme: dark) CSS in your templates to control how supported clients render in dark mode. Apple Mail and native iOS Mail have the mostreliable dark mode support.
Are images blocked by default in certain clients?
Yes. Outlook for Windows and some enterprise clients block remote images by default until the recipient explicitly allows them. Best practice:include meaningful alt text, avoid image-only designs, and ensure your email is readable without images loaded.
What causes transactional emails to land in spam?
Common causes: sending from a domain without proper SPF, DKIM, or DMARC records; using a shared IP pool where neighboring senders havepoor reputation; sending to invalid or unengaged addresses; or having transactional and marketing email share the same IP POOL ITPison'sdedicated infrastructure and isolated IP pools address the reputation contamination and routing dimensions of this problem.
How does IP reputation affect inbox placement?
ISPs evaluate the sending IP's reputation as part of their filtering decision. IPs with high complaint rates, bounce rates, or sudden volumespikes are more likely to have mail filtered. On shared infrastructure, one sender's behavior affects all others on the same IP. ITPison'sdedicated IP pools mean your reputation is shaped only by your own sending behavior.
What authentication records do I need to set up?
At minimum: SPF to authorize which IPs can send on your domain's behalf, and DKIM to cryptographically sign messages. DMARC is stronglyrecommended — it tells receiving servers what to do when SPF or DKIM checks fail and enables aggregate reporting. ITPison provides thenecessary DKIM configuration during account setup
How should I handle hard bounces?
Hard bounces indicate a permanently undeliverable address — the mailbox doesn't exist or the domain is invalid. These should be suppressedimmediately and never retried. Continuing to send to hard-bounced addresses degrades your sender reputation. ITPison surfaces bouncedata at the message level so your application can act on it in real time.
What's the difference between a hard bounce and a soft bounce?
A hard bounce is permanent — the address doesn't exist or the domain is unreachable. A soft bounce is temporary — the mailbox is full, theserver is down, or the message was too large. Soft bounces may resolve on retry; hard bounces should be suppressed permanently. ITPisonclassifies bounces by type in delivery logs.
How does open tracking work and is it reliable?
Open tracking works by embedding a IXI transparent pixel in the HTML email body. When the recipient's email client loads the image, an openevent is recorded. Reliability limitation: Apple's Mail Privacy Protection (MPP) pre-fetches images regardless of whether the email was opened,inflating open counts. Open rates are better used as directional signals than precise metrics.
Can I track clicks on links in transactional emails?
Yes. Click tracking works by rewriting links in your email to route through a tracking URL before redirecting to the destination. Note: linkrewriting changes the URL the recipient sees on hover — some enterprise security tools scan rewritten links before the click, which canregister false click events. Contact support to configure click tracking for your account
What delivery data is available in ITPison logs?
ITPison provides message-level delivery logs including send timestamp, delivery status, bounce classification and reason, retry attempts,routing path, and recipient domain. This data supports incident diagnosis, compliance audits, and operational reporting. Log retention andaccess methods are configured during account setup.