Edit: my question was marked as duplicate of How can I prevent my mail from being classified as spam?. My messages are not classified as spam but updates or promotions. Setting SPF, domain keys, not using fake address or putting unsubscribe link was solution to question of which my question is allegedly duplicate.I run a website with a simple contact form. Client asks a question, system sends it via email to official company's mail, and somebody answers the question. Reply is sent directly to client's email (TO field, not CC or BCC) from company's main email address. We have a lot of complaints that we don't reply to emails, but we do. After short investigation it came out that our replies are marked by GMail as promotions or updates and are not shown in clients' inboxes.Problem is we do not send adverts etc, we have commercial email account and provider doesn't add anything to our emails. Replies are send via provider's mail server.Typical message looks like:TO: client's-mail@gmail.com FROM: office@company-domain.comRe: Question asked by contact formHello,  This is my reply to client, written by human.Jane Doe, Company-name  Street 12345  Postal-Code City Country  tel.+00 000 000 000  fax: +00 000 000 000  www.company-domain.comThe information transmitted is intended only for the person or company to which it is addressed and  may contain confidential and privileged material.  Any  review,dissemination, retransmission, or other use of, or taking of  any action in reliance upon, this information by persons or companies  other than the intended recipient is prohibited. If you received this  in error, please contact the sender and delete the material from any computer.-----here is the same info about about privileged materials, but in polish----7 nov 2014 o 18:14 Client  wrote:Hi, this is my question.What shall I do to prevent GMail from marking my messages as promotions and put my messages to client's inbox? Why message like this is classified as promotion anyway? We do not send newsletters or send mass correspondence.
Prevent GMail marking replies to clients as promotions or updates (not spam)
email;gmail