CiviCRM Community Forums (archive)

We are experiencing inconsistent deliverability with known good addresses on these domains. One mailing will have 99.85% success, another will bounce nearly every message to these domains.

Has anyone else had issues like this? Any tips?

Here's what I know:

- Earthlink doesn't like the long VERP addresses. USers who recieve messages can't reply when these are use, so I've added a line CRM/Mailing/BAO/Mailing.php to override them.

- The most recent mailing with excessive bounces used a lot of links, making me wonder if the URL rewriting causing the message to look like a phishing scam, hence the block? Is there any reason to believe this might be the case?

- Strangely, the most successful mailing (99.85%) was somewhat off-standard, e.g., use of animated gifs, long VERP addresses.

Other than putting animated gifs in every message <g>, can anyone suggest ways to improve deliverability?

AT&T has reported that the block will be removed within 24 - 36 hours.