When starting to type an email address, eM Client will complete the address (as expected). However, I have one example where it prefixes it with what looks like an alias. However, I cannot find where the alias comes from. It is not in the contacts entry for that person.
How do I remove or change the alias?
We offer address suggestions from your contacts, but also from the recipient history and from messages in your Sent folders.
You can manage the recipient history (delete the entry or clear the whole history) and disable the Sent folder suggestions in Menu > Settings > Mail > Compose > Email Address Suggestions.
Thanks very much, Gary. That sorted it.