The most common Internet Solutions email format is {first}.{last}@is.co.za (e.g. jane.doe@is.co.za), used in about 97% of observed Internet Solutions work emails. Internet Solutions uses 7 address formats in total.
Most likely format — based on 1,266 observed addresses
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Internet Solutions email formats
96.9% of observed Internet Solutions addresses use the {first}.{last}@ format.
Email formatExampleShare
{first}.{last}@is.co.za
Examplejane.doe@is.co.za
Share96.9%
{first}@is.co.za
Examplejane@is.co.za
Share1.4%
{first}{l}@is.co.za
Examplejaned@is.co.za
Share1.0%
{last}@is.co.za
Exampledoe@is.co.za
Share0.4%
{f}{last}@is.co.za
Examplejdoe@is.co.za
Share0.1%
{f}{l}@is.co.za
Examplejd@is.co.za
Share0.1%
{last}.{first}@is.co.za
Exampledoe.jane@is.co.za
Share0.1%
Derived from 1,266 real observed addresses · data refreshed 2026-05-30. Role-based inboxes (info@, sales@, …) are excluded from format detection.
Verify the pattern before you send
Start with the format that appears most often. For Internet Solutions, that means testing {first}.{last}@is.co.za first, then verifying the exact address before it reaches your CRM or sequencer. A pattern can be common and still produce bad guesses when a person uses a nickname, a middle initial, a regional mailbox, or an older alias.
VeriMails checks syntax, MX records, SMTP behavior, disposable domains, and catch-all detection so you can keep valid addresses and skip risky ones. For larger files, credits start at $19 for 10,000 verifications and never expire. Create a free account, test the pattern on a few addresses, then buy more credits only when you need volume. Run the check again before a large campaign if the list is old, because domains change mail routing and people leave.
The most common Internet Solutions email format is {first}.{last}@is.co.za (for example jane.doe@is.co.za), used in about 97% of observed Internet Solutions work addresses. Internet Solutions also uses 6 other formats for name collisions.
How accurate is this Internet Solutions email format?
This format is derived from 1,266 real Internet Solutions addresses observed across our data, not guessed. To confirm a specific address, use the live verifier above — it checks deliverability in real time.
How do I find and verify a specific person's Internet Solutions email?
Apply the most common pattern to the person's name (e.g. jane.doe@is.co.za), then verify it on this page — or use the Find tab to get the likely address from their name automatically.
What other email formats does Internet Solutions use?
Beyond {first}.{last}@is.co.za, observed formats include {first}@is.co.za, {first}{l}@is.co.za, {last}@is.co.za, {f}{last}@is.co.za, {f}{l}@is.co.za, {last}.{first}@is.co.za, in descending order of frequency.
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