We recently saw that a particular domain (lets say it is recipient.com operated by recipient ltd) of newsletter recipients block our newsletter quite often. Therefore we asked the operating company of that domain what is wrong with our newsletters.
Recipient LTD told us:
Use clean urls and that this is the reason why our newsletter are regarded as spam or virus and get blocked.
Only refer to valid, trusted URLs in your e-mails and make sure that there is no risk of confusion. Don't link to a phishing site and don't quote or forward links to malware or spam. Also not as an example or for fun!
For security reasons, our servers do not allow unencrypted transfer of executable formats such as those used by viruses, worms and Trojans.
- Examples: ade, adp, app, asp, bas, bat, bhx, cab, ceo, chm, cmd, com, cpl, crt, csr, der, exe, fxp, hlp, hta, iframe, inf, ins, isp, its, js, jse, lnk, mad, maf, mag, mam, mar, mas, matte, mde, mim, msc, msi, msp, mst, ole, pcd, pif, reg, scr, sct, shb, shs, vb, vbe, vbmacros, vbs, vsw, wmd, ws, wsc, wsf, wsh and xxe.Because spam or virus sender often use links with ids to cover the real target of that url.
Furthermore we saw that we created every link in our newsletter with https but it gets wrapped like:
(we selfhost the dns entries and do not use a subdomain or different domain to send our emails)
The open tracking looks like this:
- How can we configure salesforce to wrap these links in https?
- Has anybody else experienced problems that the tracking functionality (opens,clicks,...) of newsletters causes block bounces?